The interpretation timeline
1 Thessalonians 5:17 Douay-Rheims

Pray without ceasing.

A.D. 108 – 1871 11 witnesses 14 excerpts

Patristic

before A.D. 750
108
A.D.
c. A.D. 50–107
“Having obtained good proof that thy mind is fixed in God as upon an immoveable rock, I loudly glorify [His name] that I have been thought worthy [to behold] thy blameless face, which may I ever enjoy in God! I entreat thee, by the grace with which thou art clothed, to press forward in thy course, and to exhort all that they may be saved. Maintain thy position with all care, both in the flesh and spirit. Have a regard to preserve unity, than which nothing is better. Bear with all, even as the Lord does with thee. Support all in love, as also thou doest. Give thyself to prayer without ceasing. Implore additional understanding to what thou already hast. Be watchful, possessing a sleepless spirit. Speak to every man separately, as God enables thee. Bear the infirmities of all, as being a perfect athlete [in the Christian life]: where the labour is great, the gain is all the more.”
Source
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“Touching times of prayer nothing at all has been prescribed, except clearly "to pray at every time and every place."”
“Further: since in the self-same commentary of Luke the third hour is demonstrated as an hour of prayer, about which hour it was that they who had received the initiatory gift of the Holy Spirit were held for drunkards; and the sixth, at which Peter went up on the roof; and the ninth, at which they entered the temple: why should we not understand that, with absolutely perfect indifference, we must pray always, and everywhere, and at every time; yet still that these three hours, as being more marked in things human-(hours) which divide the day, which distinguish businesses, which re-echo in the public ear-have likewise ever been of special solemnity in divine prayers? A persuasion which is sanctioned also by the corroborative fact of Daniel praying thrice in the day; of course, through exception of certain stated hours, no other, moreover, than the more marked and subsequently apostolic (hours)-the third, the sixth, the ninth.”
Source
373
A.D.
c. A.D. 296–373
“For no one is going to turn away from sin and start behaving righteously unless he thinks about what he is doing. Not until he has been straightened out by practicing godly behavior will he actually possess the reward of faith: the crown of righteousness that Paul possessed, having fought the good fight. That crown is laid up not just for Paul but for all who are like him in this respect. This sort of meditation and exercise in godliness should be familiar to us, as it was to the saints of old. It should be especially so in the season when the divine word calls upon us to keep the feast. For what, after all, is the feast but continual worship of God, recognition of godliness and unceasing prayer all done from the heart in full agreement with each other? St. Paul, wanting us to be so inclined, urges us, "Always rejoice, pray without ceasing, give thanks in all things."”
Source
“For such meditation and exercise in godliness, being at all times the habit of the saints, is urgent on us at the present time, when the divine word desires us to keep the feast with them if we are in this disposition. For what else is the feast, but the constant worship of God, and the recognition of godliness, and unceasing prayers from the whole heart with agreement? So Paul wishing us to be ever in this disposition, commands, saying, 'Rejoice evermore; pray without ceasing; in everything give thanks.' Not therefore separately, but unitedly and collectively, let us all keep the feast together, as the prophet exhorts, saying, 'O come, let us rejoice in the Lord; let us make a joyful noise unto God our Saviour.' Who then is so negligent, or who so disobedient to the divine voice, as not to leave everything, and run to the general and common assembly of the feast? which is not in one place only, for not one place alone keeps the feast; but 'into all the earth their song has gone forth, and to the ends of the world their words.' And the sacrifice is not offered in one place, but 'in every nation, incense and a pure sacrifice is offered unto God.' So when in like manner from all in every place, praise and prayer shall ascend to the gracious and good Father, when the whole Catholic Church which is in every place, with gladness and rejoicing, celebrates together the same worship to God, when all men in common send up a song of praise and say, Amen; how blessed will it not be, my brethren! who will not, at that time, be engaged, praying rightly?”
Source
379
A.D.
Basil of Caesarea Patristic
c. A.D. 330–379
“Then, because he [David] had been delivered from great danger, he sent up this prayer of thanksgiving to God who had rescued him. "I will bless the Lord at all times." Having escaped death, as if he were setting up norms for his life, he molded his soul to an exact manner of living, so that he ceased at no time from praise but referred the beginning of affairs, great and small, to God. "I will not think," he says, "that anything was done through my diligence nor happened through spontaneous chance, but, 'I will bless the Lord at all times,' not only in prosperity of life, but also in precarious times." The apostle, learning from this, says, "Rejoice always. Pray without ceasing. In all things give thanks."”
Source
“For prayer and psalmody, however, as also, indeed, for some other duties, every hour is suitable, that, while our hands are busy at their tasks, we may praise God sometimes with the tongue (when this is possible, or, rather, when it is conducive to edification); or, if not, with the heart.… Thus we acquire a recollected spirit—when in every action we beg from God the success of our labors and satisfy our debt of gratitude to him who gave us the power to do the work, and when, as has been said, we keep before our minds the aim of pleasing him. If this is not the case, how can there be consistency in the words of the apostle bidding us to "pray without ceasing," with those other words, "we worked night and day."”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"Pray without ceasing; In every thing giving thanks: for this is the will of God." Always to give thanks, this is a mark of a philosophic soul. Hast thou suffered any evil? But if thou wilt, it is no evil. Give thanks to God, and the evil is changed into good. Say thou also as Job said, "Blessed be the name of the Lord for ever." (Job i. 21) For tell me, what such great thing hast thou suffered? Has disease befallen thee? Yet it is nothing strange. For our body is mortal, and liable to suffer. Has a want of possessions overtaken thee? But these also are things to be acquired, and again to be lost, and that abide here. But is it plots and false accusations of enemies? But it is not we that are injured by these, but they who are the authors of them. "For the soul," he says, "that sinneth, itself shall also die." (Ezek. xviii. 4) And he has not sinned who suffers the evil, but he who has done the evil.”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“And who observed and noticed the cause of his [i.e., the psalmist's] groaning? "All my desire is before You." For it is not before men, who cannot see the heart, but is before You that all my desire is open! Let your desire be before him, and "the Father, who sees in secret, shall reward you." For it is your heart's desire that is your prayer. If your desire continues uninterrupted, your prayer continues also. For it was not without meaning, when the apostle said, "Pray without ceasing." Are we to be "without ceasing" in bending the knee and prostrating the body and lifting up our hands, such that he says, "without ceasing"? If that is what "without ceasing" means, then I do not believe it is possible. There is another kind of inward prayer without ceasing, which is the desire of the heart.”
Source
435
A.D.
John Cassian Patristic
c. A.D. 360–435
“When the mind is freed from lust, established in tranquility and does not waver in its intention toward the one supreme good, the monk will fulfill the precept of St. Paul, "Pray without ceasing," and "In every place lifting up holy hands without wrath and controversy." By purity of heart the mind is drawn away from earthly feelings and is reformed in the likeness of an angelic spirit. Then, whatever thought the mind receives, whatever it considers, whatever it does, will be a prayer of true purity and sincerity.”
Source

Scholastic

c. 1100 – 1500
1272
A.D.
Thomas Aquinas Catholic
1225–1274
“Above he showed how subjects ought to conduct themselves toward their prelates; here he shows the converse. And concerning this he does two things: first he teaches how prelates ought to conduct themselves toward subject priests; second, generally, how they ought to conduct themselves toward all, at the place "see that no one." But it should be known that the care of prelates ought to tend to two things, namely to drawing others back from sins, and to guarding themselves. As to the first, the Apostle says three things. For subjects can suffer defect in three ways: first in act, second in will, third in power. In act, when they burst forth into an act of sin, and then they are to be corrected. And although this holds for every sin, yet they are especially to be corrected concerning the sin of restlessness. And therefore he says "rebuke the unruly." 2 Thess. 3:7: "we were not unruly among you." Ecclesiasticus 19:17: "rebuke your neighbor before you threaten, and give place to fear." In will, when one does not undertake great things, because he is cast down on account of adversities and preceding sins. Hence he says "comfort the fainthearted." The fainthearted is one not having courage for great things, fearing lest he fail. Isaiah 35:4: "say to the fainthearted: take courage and do not fear." Job 4:4: "your hands have strengthened the wavering," etc. In power, when they either sin from weakness, or are weakened in a good act, and these are to be cherished. Hence he says "support," namely by cherishing in the bowels of charity, "the weak," whose power is feeble, either for resisting evils or for doing good. Romans 15:1: "we who are stronger ought to bear the weaknesses of the weak." But the prelate ought to guard himself from defect of whatever kind, and especially from impatience, because he himself carries the whole weight of the multitude. Numbers 11:14: "I cannot alone bear this whole multitude, because it is heavy for me," etc. And therefore he says "be patient toward all." Proverbs 19:11: "the teaching of a man is known through patience." Ps. 91:15: "they will be well patient, that they may proclaim." Then when he says "see that no one," he shows generally how they should conduct themselves toward all. And concerning this he does two things: first he shows how all ought to conduct themselves in certain matters; second, what in all matters, at "but all things." Concerning the first he does three things: first he shows how they ought to conduct themselves toward the neighbor; second, how they should conduct themselves in the things that pertain to God, at "rejoice always"; third, how they should conduct themselves toward his gifts, at "do not [quench] the spirit." As to the neighbor, they ought to conduct themselves so as not to inflict evils on him, and so as to strive to do him good. Hence he says: I said above in particular, but now I say in general, let no one... evil, etc. Ps.: "if I have returned evils to those who repaid me." But on the contrary: vengeance is often sought before a judge. I respond. Just as a moral act is taken according to the intention of the end, so the intention toward two things can be: either toward the evil of that person, such that it rests there, and this is unlawful, because it comes from the rancor of vengeance; or toward the good of correction, or of justice and the preservation of the commonwealth, and thus he does not render evil for evil, but good, namely his correction. As to the second he says "but always what is good," etc. And he says "pursue," not "do": because you ought to take from yourself the occasion of doing good to your neighbor, and not wait for him to give you the occasion of doing good to him. Hence Ps. 33:15: "seek peace, and pursue it." Romans 12:21: "do not be conquered by evil," namely so that you are drawn by it to do evil, "but conquer evil with good," by drawing it back to good. Gal., last chapter: "while we have time, let us do good to all." Then when he says "rejoice always," he shows how they ought to conduct themselves with regard to God, toward whom three things must be had. First, to rejoice in him; hence he says "rejoice always," namely in God, because whatever evil may occur is incomparable to the good, which is God. And therefore let no evil interrupt that; hence he says "rejoice always." Second, "pray" for benefits to be received, at "pray without ceasing." Luke 18:1: "one must always pray, and never fail." But how can this be? I respond. It must be said that this can be in three ways. First, that he always prays who does not omit the appointed hours. A similar thing is found in 2 Kings 9:7: "you shall eat bread at my table always." Second, thus: "always," that is, "pray continually," but then prayer is taken for the effect of prayer. For prayer is the interpretation or unfolding of desire, because when I desire something, then I seek it by praying. Hence prayer is also a petition for fitting things from God, and therefore desire has the force of prayer. Ps. 9:38: "the Lord has heard the desire of the poor." All things therefore that we do proceed from desire. Therefore prayer remains virtually in the good things we do, because the good things we do proceed from good desire. The Gloss: "he does not cease to pray, who does not cease to do good." Third, as to the cause of prayer, namely by giving alms. In the Lives of the Fathers: "he always prays who gives alms, because he who has received alms prays for you, even while you sleep." Likewise, third, to pray for benefits to be received and to give thanks for those received; therefore he says "in all things," namely in good things and in adverse things, "give thanks." Romans 8:28: "for those who love God, all things work together unto good." Colossians 2:7: "abounding in him in thanksgiving." Philippians 4:6: "with thanksgiving. For this is the will," etc. 1 Timothy 2:4: "who wills all men to be saved, and to come to the knowledge of the truth." Then when he says "do not [quench] the spirit," etc., he shows how they should conduct themselves toward the gifts of God. And first, that they not impede them; second, that they not despise them, at "prophecies." Now the Holy Spirit is a divine person, incorruptible and eternal, hence in his substance he cannot be extinguished. But nevertheless someone is said to extinguish the spirit, in one way, by extinguishing his fervor, either in himself or in another. Romans 12:11: "fervent in spirit." For when someone wills to do something good from the fervor of the Holy Spirit, or also when some good movement arises, and he himself impedes it, he extinguishes the Holy Spirit. Acts 7:51: "you have always resisted the Holy Spirit." In another way, by sinning mortally. For the Holy Spirit in himself always lives, but in us he lives when he makes us live in him; but when someone sins mortally, the Holy Spirit does not live in him. Wisdom 1:5: "for the Holy Spirit of discipline will flee the deceitful," etc. In a third way, by hiding it, as if he were to say: if you have the gift of the Holy Spirit, use it for the benefit of your neighbors. Ecclesiasticus 20:32: "hidden wisdom and unseen treasure, what use is there in either?" Matthew 5:15: "no one lights a lamp and puts it under a bushel," etc. "Do not despise prophecies." For some among these were endowed with the spirit of prophecy, who were reckoned by these others as insane. 1 Corinthians 14:1: "be zealous for spiritual things, but rather that you may prophesy." Or "prophecies," that is, divine teaching. For those expounding divine teaching are called prophets; as if he were to say: do not despise the words of God and the preachings. Jeremiah 20:8: "the word of the Lord has become a reproach and a derision all the day." Then when he says "but test all things," he shows how they should conduct themselves toward all things, and it is one point, that in all things they use discretion. Romans 12:1: "your reasonable service." In this matter there ought to be diligent examination, choice of the good, rejection of the bad. As to the first he says "do not despise prophecies," yet "test all things," namely those that are doubtful. For manifest things do not need examination. 1 John 4:1: "do not believe every spirit." Job 12:8: "does not the ear discern words?" As to the second he says "hold fast what is good." Galatians 4:18: "but be zealous for good, in a good thing, always." As to the third he says "abstain from every appearance of evil." Isaiah 7:15: "that he may know to refuse the evil and choose the good." And he says "appearance," because we ought also to avoid even those things which have the likeness of malice, which namely we could not observe before men without scandal to them. Then when he says "but he himself," he adds a prayer, and concerning this he does three things: first he prays for them; second he gives hope of being heard; third he gives special admonitions. He says therefore: thus I admonish, but it avails nothing unless God gives grace. Hence "may the God of peace himself sanctify you." Leviticus 21:8: "I am the Lord, who sanctifies you," etc. "In every part," that is, that you may be wholly holy. And this "that [your] whole [spirit]," etc. For on the occasion of these words some said that in man the spirit is one thing and the soul another, positing two souls in man, one which animates, the other which reasons. And these have been condemned in ecclesiastical teachings. Hence it should be known that these do not differ according to essence, but according to power. For in our soul there are certain powers which are acts of bodily organs, as are the powers of the sensitive part. There are others, which are not acts of such organs, but are abstracted from them, as are the powers of the intellective part. And these are called "spirit," as being immaterial and separated in some way from the body, inasmuch as they are not acts of the body, and they are also called "mind." Ephesians 4:23: "be renewed in the spirit of your mind." But insofar as it animates, it is called "soul," because this is proper to it. And Paul here speaks properly. For three things concur in sinning: reason, sensuality, and the execution of the body. He wishes therefore that there be sin in none of these. Not in reason; hence he says "that [your] spirit," that is, your mind, "may be kept whole." For in every sin reason is corrupted, according as every evil man is ignorant. Likewise, nor in sensuality, hence he says "soul." Likewise, nor in body; and therefore he says "and body." But this happens thus, when it is kept immune from sin. And he says "without blame," not "without sin," which belongs to Christ alone; but to be without blame belongs also to others, who, even if they commit venial sins, do not nevertheless commit grave ones, and ones by which the neighbor is scandalized. Luke 1:6: "walking in all the commandments and justifications of the Lord without blame." And he adds "at the coming," etc., namely by persevering until the end of life. Or "whole spirit" refers to the gift of the Holy Spirit, as if he were to say: may the gift of the Holy Spirit, which you have, be whole. Then when he says "faithful," etc., he gives hope of being heard; as if he were to say: as I hope, so it will be, because "he also who has called [you] will do [it]," that is, will fulfill it. Ps. 144:13: "the Lord is faithful in all his words," etc. Romans 8:30: "whom he called, these he also justified," etc. Lastly he appends familiar admonitions: namely prayer, at "pray"; likewise mutual peace, at "greet all the brothers with a holy kiss," not a treacherous one, like Judas, Matthew 26:49, nor a lustful one, like the lustful woman, Proverbs 7:10. "That it be read," etc. For he feared lest the prelates, on account of certain things that were here, might conceal it. Proverbs 11:26: "he who hides grain will be cursed among the peoples," etc. Lastly he concludes the epistle with a salutation.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“In everything give thanks,.... That is, to God the Father, in the name of Christ; see Eph 5:20 thanks are to be given to him for all things, as the Ethiopic version renders it; for all temporal good things; for our beings, the preservation of them; for food and raiment, and all the mercies of life; for the means of grace, the word and ordinances, and the ministers of the Gospel; for spiritual blessings, for electing, redeeming, regenerating, adopting, pardoning, justifying, and persevering grace: for a meetness for heaven, a right unto it, and a good hope of it; and especially for Jesus Christ, for such an husband, such an head, such a surety and Saviour, and advocate with the Father, as he is; and for life, peace, joy, comfort, righteousness, and salvation in him: and thanks should be given to God in every circumstance of life; in adversity, as Job did; when not in so comfortable and agreeable a frame of soul as to be wished for, since it might be worse, and is not black despair; even under the temptations of Satan, since they might be greater and heavier, and since the grace of God is sufficient to bear up under them, and deliver out of them, and since there is such a sympathizing high priest and Saviour; and in afflictions of every kind, since they are all for good, temporal, or spiritual, or eternal. For this is the will of God; which may refer either to all that is said from Th1 5:11 to this passage, or particularly to this of giving thanks; which is the revealed and declared will of God, is a part of that good, perfect, and acceptable will of his, and what is well pleasing in his sight, and grateful to him; see Psa 69:30 and is in Christ Jesus concerning you; either declared in and by him, who has made known the whole of the will of God, and so the Arabic version, "which he wills of you by Jesus Christ"; or which is exemplified in Christ, who for, and in all things, gave thanks to God, and had his will resigned to his in every circumstance of life; or, which being done, is acceptable to God through Christ. The Alexandrian copy reads, "for this is the will of God towards you in Christ Jesus"; that is, with respect to you who are in Christ secretly by election, and openly by the effectual calling; and who, of all men in the world, have reason to be thankful for everything, and in every circumstance.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Pray without ceasing - Ye are dependent on God for every good; without him ye can do nothing; feel that dependence at all times, and ye will always be in the spirit of prayer; and those who feel this spirit will, as frequently as possible, be found in the exercise of prayer.”
1871
A.D.
1871
“The Greek is, "Pray without intermission"; without allowing prayerless gaps to intervene between the times of prayer.”
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.