Thematic Bible: What childhood and youth are

Rejoice, O young man, in your adolescence, and let your heart cheer you in the days of your [full-grown] youth. And walk in the ways of your heart and in the sight of your eyes, but know that for all these things God will bring you into judgment. Therefore remove [the lusts that end in] sorrow and vexation from your heart and mind and put away evil from your body, for youth and the dawn of life are vanity [transitory, idle, empty, and devoid of truth].