Ecclesiastes 5:16-20

[16] This also is a grievous evil: just as he came, so shall he go; and what gain has he that he toiled for the wind,
[17] and spent all his days in darkness and grief, in much vexation and sickness and resentment?
[18] Behold, what I have seen to be good and to be fitting is to eat and drink and find enjoyment in all the toil with which one toils under the sun the few days of his life which God has given him, for this is his lot.
[19] Every man also to whom God has given wealth and possessions and power to enjoy them, and to accept his lot and find enjoyment in his toil—this is the gift of God.
[20] For he will not much remember the days of his life because God keeps him occupied with joy in his heart.