You who are young, be happy

Ecclesiastes 11:9-10 (New International Version)

⁹ You who are young, be happy while you are young,
   and let your heart give you joy in the days of your youth.
Follow the ways of your heart
   and whatever your eyes see,
but know that for all these things
   God will bring you into judgment.
¹⁰ So then, banish anxiety from your heart
   and cast off the troubles of your body,
   for youth and vigor are meaningless.