the moment

Enjoy your childhood, it will not last
Yet the child feared; grew up all too fast.

Enjoy teenage years, they won't come back
Yet the teen rebelled; all he saw was lack.

Enjoy all your energy, you'll tire in time
Yet the youth worried; fretting stole his prime.

Enjoy family life, till you have the gift
Yet the parent sighed; a burden hard to lift.

Enjoy this moment, it'll never come again
And the elder realized; and ended all his pain.