Proverbs 26:13-27:27
Do not boast about tomorrow,
for you do not know what a day may bring.Proverbs 27:1
Of course, generally speaking, boasting isn’t particularly good form, over-stating our own self-importance. But boasting over something that hasn’t happened yet is that much more over the top. James puts it this way:
Come now, you who say, “Today or tomorrow we will go into such and such a town and spend a year there and trade and make a profit”—yet you do not know what tomorrow will bring. What is your life? For you are a mist that appears for a little time and then vanishes. Instead you ought to say, “If the Lord wills, we will live and do this or that.” As it is, you boast in your arrogance. All such boasting is evil.
James 4:13-16
As for other boasting, we might consider these verses, too:
Thus says the LORD: “Let not the wise man boast in his wisdom, let not the mighty man boast in his might, let not the rich man boast in his riches, but let him who boasts boast in this, that he understands and knows Me, that I am the LORD who practices steadfast love, justice, and righteousness in the earth. For in these things I delight, declares the LORD.”
Jeremiah 9:23-24
But far be it from me to boast except in the cross of our Lord Jesus Christ, by which the world has been crucified to me, and I to the world.
Galatians 6:14
See also: