In James 4:13 he wrote that there were folks who predicted what would happen in a year’s time. Verse 14-15 says, “Whereas you do not know what will happen tomorrow…Instead you ought to say, If the Lord wills, we shall live and do this or that.”
An echo from my childhood are the words, “If the Lord tarries, then we will…” We fall into error when we presume something will take place. David’s prayer in Psalm 19:13 in one I pray daily. It says, “Keep back Your servant also from presumptuous sins; let them not have dominion over me…”
James 5:12 says, “…let your Yes be Yes, and your No be No, lest you fall into judgment.” Remember the parable of the two sons? Matthew 21-28 is the account. The father asked the first son to go work in the vineyard. He said he wouldn’t but then went.