Do Not Boast about Tomorrow

(Proverbs 27:1)

13 Come now, you who say, “Today or tomorrow we will go to this or that city, spend a year there, carry on business, and make a profit.” 14 You do not even know what [will happen] tomorrow! What [is] your life? You are a mist that appears for a little [while] and then vanishes.

15 Instead, you [ought] to say, “If the Lord is willing, we will live and do this or that.” 16 As it is, you boast in your proud intentions. All such boasting is evil. 17 Anyone, then, who knows [the] right thing to do, yet fails to do [it], is guilty of sin.