Proverbs 27:1

“Boast not thyself of tomorrow, etc.] Or, “of tomorrow day”f741. Either of having a tomorrow, or of any future time; no man can assure himself of more than the present time; for, however desirable long life is, none can be certain of it; so says the poetf742: for though there is a common term of man’s life, threescore years and ten, yet no one can be sure of arriving to it; and, though there may be a human probability of long life, in some persons of hale and strong constitutions, yet there is no certainty, since life is so frail a thing; the breath of man is in his nostrils, which is soon and easily stopped; his life is but as a vapour, which appears for a little while, and then vanishes…”

“(Pro. 27:1-27) Do not confide implicitly in your plans (Pro 16:9; Pro 19:21; Jam 4:13-15).”

“Boast not - Of any good thing which thou purposeth to do, or hopest to receive tomorrow, or hereafter. Knowest not - What may happen in the space of one day. The day is said to bring forth, what God by his almighty power either causes or suffers to be brought forth or done in it. Proverbs 27:3”

“27:1 We should plan (24:27), but our plans succeed only when God so wills (16:1, 3, 33; Jas 4:13-16). Only fools think that they control the future.”

“Boast: Psa 95:7; Isa 56:12; Luk 12:19, Luk 12:20; Co2 6:2; Jam 4:13-16 to morrow: Heb. to morrow day thou: Sa1 28:19 Proverbs 27:2”

“In the group Pro 27:1-6 of this chapter every two proverbs form a pair. The first pair is directed against unseemly boasting: 1 Boast not thyself of to-morrow, For thou knowest not what a day bringeth forth. The ב of בּיום is like, e.g., that in Pro 25:14, the ב of the ground of boasting. One boasts of to-morrow when he boasts of that which he will then do and experience. This boasting is foolish and presumptuous ( Luk 12:20), for the future is God's; not a moment of the future is in our own power, we know not what a day, this present day or to-morrow ( Jam 4:13), will bring forth, i.e., (cf. Zep 2:2) will disclose, and cannot therefore order anything beforehand regarding it. Instead of…”