Come now, you who say, “Today or tomorrow we will go to such and such a city, spend a year there, buy and sell, and make a profit”; whereas you do not know what will happen tomorrow.
For what is your life? It is even a vapor that appears for a little time and then vanishes away.
Instead you ought to say, “If the Lord wills, we shall live and do this or that.” But now you boast in your arrogance. All such boasting is evil. Therefore, to him who knows to do good and does not do it, to him it is sin.
James 4:13-17
(NKJV)