Do Not Boast about Tomorrow

James addresses those who speak confidently about future business plans as though time, life, and outcomes were theirs to command. He reminds them that tomorrow is unknown and that human life is as fleeting as a passing mist. The proper alternative is not passivity but humble dependence expressed in the words, "If the Lord is willing." Proud boasting about intentions is condemned as evil, and the paragraph concludes with a broader moral principle: failure to do the good one knows is itself sin. The result is a searching warning against practical atheism in planning and obedience.

C¹³ome 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.” ¹⁴You 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. ¹⁵Instead, you ought to say, “If the Lord is willing, we will live and do this or that.” ¹⁶As it is, you boast in your proud intentions. All such boasting is evil. ¹⁷Anyone, then, who knows the right thing to do, yet fails to do it, is guilty of sin.