You will find more happiness growing down than up.
In every real man a child is hidden that wants to play.
Happy is he who still loves something he loved in the nursery: He has not been broken in two by time; he is not two men, but one, and he has saved not only his soul but his life.
The great man is he who does not lose his child's-heart.
~Mencius, Book IV
Every child is an artist. The problem is how to remain an artist once he grows up.
When you're green you're growing, and when you're ripe you start to rot.
The end of childhood is when things cease to astonish us. When the world seems familiar, when one has got used to existence, one has become an adult.
It is a happy talent to know how to play.
~Ralph Waldo Emerson
A man is getting old when he walks around a puddle instead of through it.
~R.C. FergusonThe opposite of play is not work. It's depression.
~Brian Sutton-Smith (play theorist, 1924-)