James 4:13 Go to now, ye that say, To day or to morrow we will go into such a city, and continue there a year, and buy and sell, and get gain:
14 Whereas ye know not what shall be on the morrow. For what is your life? It is even a vapour, that appeareth for a little time, and then vanisheth away.
In 13 James is saying it is ok to be a wise business man but do not leave God out of the things you do and plan and also we should not put off to tomorrow what needs to be done today. As verse 14 goes on to say we do not know what tomorrow will hold. Even though we may live to be a hundred years our live is but a vapor compared to eternity. We feel when someone dies at young age, even a baby, they had a short life and in human terms they did, but again compared to eternity it is but a vapor no matter how long we live. These verses show how important it is that we have our heart and soul right with God each and every day because we are not promised tomorrow.