Ecclesiastes 11:8-10

Yes, if a man should live many years, let him rejoice in them all; yet let him remember the days of darkness, for they will be many. All that is to come will be futility. Rejoice, young man, in your childhood, and let your heart be pleasant in the days of your young manhood. And walk in the ways of your heart and in the desires of your eyes, but know that God will bring you into judgment for all these things. Therefore, remove sorrow and anger from your heart and put away pain from your body, for childhood and the prime of life are fleeting. [2 Cor 7:1; 2 Tim 2:22]