Growing old is mandatory; growing up is optional.

Growing Old is Mandatory - Growing Up Is Optional

The trick is growing up without growing old.

It's easy to grow old if you haven't grown up

You can hide things from the world, but you can never hide things from time.

I think I may have to grow up without growing old. I think we're going to have to define differently what I'm going to be. We're going to have to define my growing up differently.