Rejoice, O young [wo]man, in your youth,
And let your heart cheer you in the days of your youth;
Walk in the ways of your heart,
And in the sight of your eyes;
But know that for all these
God will bring you into judgment.
Therefore remove sorrow from your heart,
And put away evil from your flesh,
For childhood and youth are vanity [fleeting].
Remember now your Creator in the days of your youth.
-Ecclesiastes 11:9-12:1, one of my favorite passages summing up the guiding principles I want to live by