James 4:13-17 - Arrogant Boasting About The Future
13 Go to now, ye that say, "Today and tomorrow let us go into such a city and continue there a year and buy, and sell, and win," 14 and yet cannot tell what shall happen tomorrow. For what thing is your life? It is even a vapor that appeareth for a little time, and then vanisheth away.
15 For that, ye ought to say, "If the Lord will, and if we live, let us do this or that." 16 But now ye rejoice in your boastings. All such rejoicing is evil. 17 Therefore to him that knoweth how to do good, and doth it not: to him, it is sin.