Ecclesiastes 11:8-9 RSV

8 For if a man lives many years, let him rejoice in them all; but let him remember that the days of darkness will be many. All that comes is vanity.
9 Rejoice, O young man, in your youth, and let your heart cheer you in the days of your youth; walk in the ways of your heart and the sight of your eyes. But know that for all these things God will bring you into judgment.