To be mature means to face, and not evade, every fresh crisis that comes.

By the time I'd grown up, I naturally supposed that I'd be grown up.

—Eve Babitz

There's no point in being grown up if you can't be childish sometimes.

—Doctor Who

What I look forward to is continued immaturity followed by death.

—Dave Barry

Another unsettling element in modern art is that common symptom of immaturity, the dread of doing what has been done before.

—Edith Wharton

Human beings are the only creatures that allow their children to come back home.

—Bill Cosby