Ecclesiastes 3:12-13; Ecclesiastes 3:22

12 I am certain that there is nothing better for a man than to be glad, and to do good while life is in him.

13 And for every man to take food and drink, and have joy in all his work, is a reward from God.

22 So I saw that there is nothing better than for a man to have joy in his work--because that is his reward. Who will make him see what will come after him?