The interpretation timeline
James 4:15 Douay-Rheims

For what is your life? It is a vapour which appeareth for a little while, and afterwards shall vanish away. For that you should say: If the Lord will, and if we shall live, we will do this or that.

A.D. 407 – 1871 7 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“James is not trying to take away our freedom to decide, but he is showing us that it is not just what we want that matters. We need God's grace to complement our efforts and ought to rely not on them but on God's love for us. As it says in Proverbs: "Do not boast about tomorrow, for you do not know what a day may bring forth."”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“For that ye ought to say,.... Instead of saying we will go to such and such a place, and do this, and that, and the other thing, it should be said, if the Lord will, and we shall live, and do this and that; the last "and" is left out in the Vulgate Latin, Syriac, Arabic, and Ethiopic versions; and the passage rendered thus, "if the Lord will, and we shall live, we will do this": so that here are two conditions of doing anything; the one is, if it should be agreeable to the determining will and purpose of God, by which everything in the world comes to pass, and into which the wills of men should be resolved, and resigned; and the other is, if we should live, since life is so very uncertain and precarious: and the sense is, not that this exact form of words should be always used, but what is equivalent to them, or, at least, that there should be always a sense of these things upon the mind; and there should be a view to them in all resolutions, designs, and engagements: and since the words are so short and comprehensive, it might be proper for Christians to use themselves to such a way of speaking; upon all occasions; we find it used by the Apostle Paul frequently, as in Act 18:2, and even by Jews, Heathens, and Turks. It is a saying of Ben Syra, the Jew (p), "let a man never say he will do anything, before he says , "if God will"'' So Cyrus, king of Persia, when, under pretence of hunting, he designed an expedition into Armenia, upon which an hare started, and was caught by an eagle, said to his friends, this will be a good or prosperous hunting to us, , "if God will" (q). And very remarkable are the words of Socrates to Alcibiades, inquiring of him how he ought to speak; says Socrates, , "if God will" (r); and says he, in another place (s), "but I will do this, and come unto thee tomorrow, "if God will".'' And it is reported of the Turks (t), that they submit everything to the divine will; as the success of war, or a journey, or anything, even of the least moment, they desire to be done; and never promise themselves, or others, anything, but under this condition, "In Shallah", if God will. (p) Sentent. 11. (q) Xenophon. Cyropaed. l. 2. c. 25. (r) Plato in Aleibiade, p. 135. (s) Plato in Laches. (t) Smith de Moribus Turc. p. 74.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“For that ye ought to say - Αντι τοι λεγειν ὑμας· Instead of saying, or instead of which ye should say, If the Lord will, we shall live - I think St. James had another example from the rabbins in view, which is produced by Drusius, Gregory, Cartwright, and Schoettgen, on this clause: "The bride went up to her chamber, not knowing what was to befall her there." On which there is this comment: "No man should ever say that he will do this or that, without the condition If God Will. A certain man said, 'To-morrow shall I sit with my bride in my chamber, and there shall rejoice with her.' To which some standing by said, אם גוזר השם im gozer hashshem, 'If the Lord will.' To which he answered, 'Whether the Lord will or not, to-morrow will I sit with my bride in my chamber.' He did so; he went with his bride into his chamber, and at night they lay down; but they both died, antequam illam cognosceret." It is not improbable that St. James refers to this case, as he uses the same phraseology. On this subject I shall quote another passage which I read when a schoolboy, and which even then taught me a lesson of caution and of respect for the providence of God. It may be found in Lucian, in the piece entitled, Χαρων, η επισκοπουντες, c. 6: Επι δειπνον, οιμαι, κληθεις ὑπο τινος των φιλων ες την ὑστεραιαν, μαλιστα ἡξω, εφη· και μεταξυ λεγοντος, απο του τεγους κεραμις επιπεσουσα, ουκ οιδ' ὁτου κινησαντος, απεκτεινεν αυτον· εγελασα ουν, ουκ επιτελεσαντος την ὑποσχεσιν. "A man was invited by one of his friends to come the next day to supper. I will certainly come, said he. In the mean time a tile fell from a house, I knew not who threw it, and killed him. I therefore laughed at him for not fulfilling his engagement." It is often said Fas est et ab hoste doceri, " we should learn even from our enemies." Take heed, Christian, that this heathen buffoon laugh thee not out of countenance.”
Source
1849
A.D.
1774–1849
“For what is your life? it is a vapour. We frequently meet with three beautiful comparisons in holy writ. “Remember that my life is but wind….As a cloud is consumed, and passeth away; so he that shall go down to hell, shall not come up.” (Job vii. 7, 9.) “Man is like to vanity, his days pass away like a shadow.” (Psalm cxliii. 4.) Similar expressions also frequently occur in profane authors. Nemo tam Divos habuit faventes Crastinum ut possit sibi polliceri. (Seneca) With reason then did our Saviour say, “Be you then also ready, for at what hour you think not, the Son of Man will come.” (Luke xii. 40.) (Calmet)”
Source
1863
A.D.
1796–1863
“G. yaf. P. "even." It is wanting in the Alexandrian manuscript. "In no author, sacred or profane, is there a finer image of the brevity and uncertainty of human life than this given by James." Macknight.”
1871
A.D.
1871
“Literally, "instead of your saying," &c. This refers to "ye that say" (Jam 4:13). we shall live--The best manuscripts read, "We shall both live and do," &c. The boasters spoke as if life, action, and the particular kind of action were in their power, whereas all three depend entirely on the will of the Lord.”

Undated

date unknown
date
unknown
Glossa Ordinaria Medieval
“For what is your life? etc. He does not agree with those who say that after death there is nothing, and that death itself is nothing. But he so speaks as to teach that the life of the depraved is short in the present: which nevertheless in the future eternal death shall follow.”
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.