It is sad to grow old but nice to ripen.

I believe the sign of maturity is accepting deferred gratification.

Maturity is often more absurd than youth and very frequently is most unjust to youth.

Maturity is the capacity to endure uncertainty.

If boyhood and youth are but vanity, must it not be our ambition to become men?

Maturity is knowing when to be immature.

Maturity begins to grow when you can sense your concern for others outweighing your concern for yourself.

True maturity is only reached when a man realizes he has become a father figure to his girlfriends boyfriends -- and he accepts it.

When the apple is ripe it will fall.

Maturity consists in no longer being taken in by oneself.

One does not get better but different and older and that is always a pleasure.

The immature man wants to die nobly for a cause, while the mature man wants to live humanely for one.

My experience is that as soon as people are old enough to know better, they don't know anything at all.