James 1:19

In this part of the chapter we are required, I. To restrain the workings of passion. This lesson we should learn under afflictions; and this we shall learn if we are indeed begotten again by the word of truth. For thus the connection stands - An angry and hasty spirit is soon provoked to ill things by afflictions, and errors and ill opinions become prevalent through the workings of our own vile and vain affections; but the renewing grace of God and the word of the gospel teach us to subdue these: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath, Jam 1:19. This may refer, 1. To the word of truth spoken of in the verse foregoing. And so we may observe, It is our duty rather to hear God's word, and apply our minds to understand it, than to speak according to our own fancies or the opinions of men, and to run into heat and passion thereupon. Let not such errors as that of God's being the occasion of men's sin ever be hastily, much less angrily, mentioned by you (and so as to other errors); but be ready to hear and consider what God's word teaches in all such cases. 2. This may be applied to the afflictions and temptations spoken of in the beginning of the chapter.

— Matthew Henry's Concise Commentary (public domain)

Wherefore--as your evil is of yourselves, but your good from God. However, the oldest manuscripts and versions read thus: "YE KNOW IT (so Eph 5:5; Heb 12:17), my beloved brethren; BUT (consequently) let every man be swift to hear," that is, docile in receiving "the word of truth" (Jam 1:18, Jam 1:21). The true method of hearing is treated in Jam 1:21-27, and Jam. 2:1-26. slow to speak-- (Pro 10:19; Pro 17:27-28; Ecc 5:2). A good way of escaping one kind of temptation arising from ourselves (Jam 1:13). Slow to speak authoritatively as a master or teacher of others (compare Jam 3:1): a common Jewish fault: slow also to speak such hasty things of God, as in Jam 1:13. Two ears are given to us, the rabbis observe, but only one tongue: the ears are open and exposed, whereas the tongue is walled in behind the teeth. slow to wrath-- (Jam 3:13-14; Jam 4:5). Slow in becoming heated by debate: another Jewish fault (Rom 2:8), to which much speaking tends. TITTMANN thinks not so much "wrath" is meant, as an indignant feeling of fretfulness under the calamities to which the whole of human life is exposed; this accords with the "divers temptations" in Jam 1:2. Hastiness of temper hinders hearing God's word; so Naaman, Kg2 5:11; Luk 4:28.

— Jamieson-Fausset-Brown Commentary (public domain)