The interpretation timeline
James 3:6 Douay-Rheims

And the tongue is a fire, a world of iniquity. The tongue is placed among our members, which defileth the whole body, and inflameth the wheel of our nativity, being set on fire by hell.

A.D. 379 – 1871 7 witnesses

Patristic

before A.D. 750
379
A.D.
Basil of Caesarea Patristic
c. A.D. 330–379
“If you love life, fulfill the commandment of life. "The one who loves me," said Jesus, "keeps my commandments," and the first commandment is this: "Keep your tongue from evil, and your lips from speaking guile." For the sin which is caused by the tongue is very active and many-sided, being active in wrath, lust, hypocrisy, judgment and deception. Do we need to recall the many names which are given to sins of the tongue? For from it come slanders, coarse jokes, idiocies, irrelevant accusations, bitterness, swearing, false witness—the tongue is the creator of all these evil things and more.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“Therefore, guard the tip of the tongue, for it is like a majestic stallion. For if you put a bit in its mouth and teach it to walk in order, it adapts to this and is satisfied. But if you let it run wild, it becomes the vehicle of the devil and his angels.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And the tongue is a fire,.... It is like to fire, very useful in its place, to warm and comfort; so is the tongue in Christian conversation, and in the ministry of the word; the hearts of God's children burn within them, while they are talking together, and while the Scriptures of truth are opening to them; but as fire should be carefully watched, and kept, so should men take heed to their ways, that they sin not with their tongue, and keep their tongue from evil, and their lips from speaking guile; for as fire kindles and rises up into a flame, so unchaste, angry, and passionate words, stir up the flame of lust, anger, envy, and revenge; and as fire is of a spreading nature, so are lies, scandal, and evil reports vented by the tongue; and as fire devours all that comes in its way, such are the words of an evil tongue; and therefore are called devouring words, Psa 52:4 they devour the good names of men, and corrupt their good manners, and destroy those who make use of them; and what wood is to fire, and coals to burning coals, that are whisperers, tale bearers, backbiters, and contentious persons to strife, Pro 26:20 a world of iniquity; that is, as the world is full of things, and full of sin, for it lies in wickedness, so is the tongue full of iniquity; there is a world of it in it; it abounds with it; it cannot well be said how much sin is in it, and done, or occasioned by it; as blasphemy against God, Father, Son, and Spirit; cursing of men, imprecations on themselves, their souls, and bodies, and on others, with a multitude of profane and dreadful oaths; obscene, filthy, and unchaste words; angry, wrathful, and passionate ones; lies, flatteries, reproaches, backbitings, whisperings, tale bearings, &c. And the Jews say, that he that uses an evil tongue multiplies transgression, and that it is equal to idolatry, adultery, and murder (h), and the cause of all sin; and which they express by way of fable, in this manner (i): "when Adam sinned, God laid hold on him, and slit his tongue into two parts, and said unto him, the wickedness which is, or shall be in the world, thou hast begun with an evil tongue; wherefore I will make all that come into the world know that thy tongue is the cause of all this.'' The Syriac version renders this clause thus, "and the world of iniquity is as wood"; or the branch of a tree; the tongue is fire, and a wicked world is fuel to it. So is the tongue amongst our members, that it defileth the whole body: the body politic, a whole nation, filling it with contention, strife, division, and confusion; and the ecclesiastical body, the church, by sowing discord, fomenting animosities, making parties, and spreading errors and heresies, whereby the temple of God is defiled; and the natural body, and the several members of it, even the whole person of a man, soul and body, bringing upon him a blot of infamy and reproach never to be wiped off; as for instance, the vice of the tongue, lying, does; and oftentimes through the tongue, the actions done in the body, which seem good, are quite spoiled: and setteth on fire the course of nature, or "wheel of nature": the natural body, as before, in which there is a continual rotation or circulation of the blood, by which it is supported; this is the wheel broken at the cistern at death, in Ecc 12:6 or the course of a man's life and actions, yea, of all generations, and the vicissitudes and changes which have happened in them, on which the tongue has a great influence; and so the Syriac version renders it, "and sets on fire the series of our genealogies, or our generations, which run like wheels": or it may intend the frame of nature, the whole fabric of the universe, and the general conflagration of it, which will be owing to the tongue; or because men's tongues are against the Lord, to provoke the eyes of his glory, because of the hard speeches which ungodly sinners have spoken against Christ and his people, of which they will be convinced by flames of fire about them: and it is set on fire of hell; that is, by the devil; for as heaven sometimes is put for God, who dwells in heaven, Mat 21:25 so hell is put for the devil, whose habitation it is; see Mat 16:18, and the sense is, that the tongue is influenced, instigated, and stirred up by Satan, to speak many evil things, and it will be hereafter set on fire in hell, as the tongue of the rich man in Luk 16:24. To which purpose are those words of the Talmud (k); "whoever uses an evil tongue, the holy blessed God says to hell, I concerning him above, and thou concerning him below, will judge him, as it is said, Psa 120:3. "What shall be done to thee, thou false tongue? sharp arrows of the mighty, with coals of juniper", there is no arrow but the tongue, according to Jer 9:8 and there is no mighty one but God, Isa 42:13 "coals of juniper", , these are hell.'' (h) T. Bab. Erachin, fol. 15. 2. Tzeror Hammor, fol. 100. 1. (i) Otiot R. Aquiba in Ketoreth Hassammim in Gen. fol. 12. 4. (k) T. Bab. Erachin, fol. 15. 2. Yalkut, par. 2. fol. 127. 2.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“The tongue is a fire - It is often the instrument of producing the most desperate contentions and insurrections. A world of iniquity - This is an unusual form of speech, but the meaning is plain enough; World signifies here a mass, a great collection, an abundance. We use the term in the same sense - a world of troubles, a world of toil, a world of anxiety; for great troubles, oppressive toil, most distressing anxiety. And one of our lexicographers calls his work a world of words; i.e. a vast collection of words: so we also say, a deluge of wickedness, a sea of troubles; and the Latins, oceanus malorum, an ocean of evils. I do not recollect an example of this use of the word among the Greek writers; but in this sense it appears to be used by the Septuagint, Pro 17:6 : Του πιστου ὁλος ὁ κοσμος των χρηματων, του δε απιστου ουδε οβολος, which may be translated, "The faithful has a world of riches, but the unfaithful not a penny." This clause has nothing answering to it in the Hebrew text. Some think that the word is thus used, Pe2 2:5 : And brought the flood, κοσμῳ ασεβων, on the multitude of the ungodly. Mr. Wakefield translates the clause thus: The tongue is the varnisher of injustice. We have seen that κοσμοςsignifies adorned, elegant, beautiful, etc., but I can scarcely think that this is its sense in this place. The Syriac gives a curious turn to the expression: And the tongue is a fire; and the world of iniquity is like a wood. Above, the same version has: A little fire burns great woods. So the world of iniquity is represented as inflamed by the wicked tongues of men; the world being fuel, and the tongue a fire. So is the tongue among our members - I think St. James refers here to those well known speeches of the rabbins, Vayikra Rabba, sec. 16, fol. 159. "Rabbi Eleazar said, Man has one hundred and forty-eight members, some confined, others free. The tongue is placed between the jaws; and from under it proceeds a fountain of water, (the great sublingual salivary gland), and it is folded with various foldings. Come and see what a flame the tongue kindles! Were it one of the unconfined members, what would it not do?" The same sentiment, with a little variation, may be found in Midrash, Yalcut Simeoni, par. 2, fol. 107; and in Erachin, fol. xv. 2, on Psa 120:3 : What shall be given unto thee, or what shall be done unto thee, thou false tongue? "The holy blessed God said to the tongue: All the rest of the members of the body are erect, but thou liest down; all the rest are external, but thou art internal. Nor is this enough: I have built two walls about thee; the one bone, the other flesh: What shall be given unto thee, and what shall be done unto thee, O thou false tongue?" Setteth on fire the course of nature - Φλογιζουσα τον τροχον της γενεσεως· And setteth on fire the wheel of life. I question much whether this verse be in general well understood. There are three different interpretations of it: 1. St. James does not intend to express the whole circle of human affairs, so much affected by the tongue of man; but rather the penal wheel of the Greeks, and not unknown to the Jews, on which they were accustomed to extend criminals, to induce them to confess, or to punish them for crimes; under which wheels, fire was often placed to add to their torments. In the book, De Maccabaeis, attributed to Josephus, and found in Haverkamp's edition, vol. ii., p. 497-520, where we have the account of the martyrdom of seven Hebrew brothers, in chap. ix, speaking of the death of the eldest, it is said: Ανεβαλον αυτον επι τον τροχοι - περι ὁν κατατεινομενος· "They cast him on the wheel, over which they extended him; πυρ ὑπεστρωσαν και διηρεθισαν τον τροχον προσεπικατατεινοντες· they put coals under it, and strongly agitated the wheel." And of the martyrdom of the sixth brother it is said, cap. 11: Παρηγον επι τον τροχον, εφ' οὑ κατατεινομενος εκμελως και εκσφονδυλιζομενος ὑπεκαιετο, και οβελισκους δε οξεις πυρωσαντες, τοις νοτοις προσεφερον, και τα πλευρα διαπειραντες αυτου, και τα σπλαγχνα διεκαιον· They brought him to the wheel, on which, having distended his limbs, and broken his joints, they scorched him with the fire placed underneath; and with sharp spits heated in the fire, they pierced his sides, and burned his bowels. The fire and the wheel are mentioned by Achilles Tatius, lib. 7, p. 449. "Having stripped me of my garments, I was carried aloft, των μεν μαστιγας κομιζοντων, των δε πυρ και τροχον, some bringing scourges, others the fire and the wheel." Now as γενεσις often signifies life, then the wheel of life will signify the miseries and torments of life. To set on fire the wheel of life is to increase a man's torments; and to be set on fire from hell implies having these miseries rendered more active by diabolic agency; or, in other words, bad men, instigated by the devil, through their lies and calumnies, make life burdensome to the objects of their malicious tongues. The wheel and the fire, so pointedly mentioned by St. James, make it probable that this sort of punishment might have suggested the idea to him. See more in Kypke. 2. But is it not possible that by the wheel of life St. James may have the circulation of the blood in view? Angry or irritating language has an astonishing influence on the circulation of the blood: the heart beats high and frequent; the blood is hurried through the arteries to the veins, through the veins to the heart, and through the heart to the arteries again, and so on; an extraordinary degree of heat is at the same time engendered; the eyes become more prominent in their sockets; the capillary vessels suffused with blood; the face flushed; and, in short, the whole wheel of nature is set on fire of hell. No description can be more natural than this: but it may be objected that this intimates that the circulation of the blood was known to St. James. Now supposing it does, is the thing impossible? It is allowed by some of the most judicious medical writers, that Solomon refers to this in his celebrated portraiture of old age, particularly in Ecc 12:6 : "Or ever the silver cord be loosed, or the golden bowl be broken, or the pitcher be broken at the fountain, or the wheel broken at the cistern." Here is the very wheel of life from which St. James might have borrowed the idea; and the different times evidently refer to the circulation of the blood, which might be as well known to St. James as the doctrine of the parallax of the sun. See on Jam 1:17 (note). 3. It is true, however, that the rabbins use the term גלגל תולדות gilgal toledoth, "the wheel of generations," to mark the successive generations of men: and it is possible that St. James might refer to this; as if he had said: "The tongue has been the instrument of confusion and misery through all the ages of the world." But the other interpretations are more likely.”
1863
A.D.
1796–1863
“It is the instrument and cause of numberless sins. G. P. "so is the tongue among our members." " So," is wanting in the Alexandrian and Vatican manu- scripts, and in the chief versions, and it is therefore now rejected by critics.”
1871
A.D.
1871
“Translate, "The tongue, that world of iniquity, is a fire." As man's little world is an image of the greater world, the universe, so the tongue is an image of the former [BENGEL]. so--omitted in the oldest authorities. is--literally, "is constituted." "The tongue is (constituted), among the members, the one which defileth," &c. (namely, as fire defiles with its smoke). course of nature--"the orb (cycle) of creation." setteth on fire . . . is set on fire--habitually and continually. While a man inflames others, he passes out of his own power, being consumed in the flame himself. of hell--that is, of the devil. Greek, "Gehenna"; found here only and in Mat 5:22. James has much in common with the Sermon on the Mount (Pro 16:27).”
Source

Undated

date unknown
date
unknown
Glossa Ordinaria Medieval
“The universality of iniquity. He calls it a universality, because through it nearly all crimes are either contrived, as robberies and ravishments; or perpetrated, as perjuries and false testimonies; or defended, as when any impure man, excusing the crime he has committed, feigns a good which he has not done. Which defileth the whole body. And because such is the tongue, it defiles the whole body and makes it be reckoned unclean in the sight of God; and therefore it is a grave thing to undertake the mastership: because it is set among our members, it is one of our members, too near to us. It inflameth the wheel, etc. It contaminates the whole course of temporal life, etc., up to it compels to bring to effect through the other members.”
Source
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.