Maturity is knowing when to be immature.
Maturity: among other things, the unclouded happiness of the child at play, who takes it for granted that he is at one with his play-mates.
By the age of twenty, any young man should know whether or not he is to be a specialist and just where his tastes lie. By postponing the question we have set on immaturity a premium which controls most American personality to its deathbed.
Maturity: Be able to stick with a job until it is finished. Be able to bear an injustice without having to get even. Be able to carry money without spending it. Do your duty without being supervised.
Show me a man with both feet on the ground and I'll show you a man who can't get his pants on.
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.
Only the middle-aged have all their five senses in the keeping of their wits.
When the apple is ripe it will fall.
Basically my wife was immature. I'd be at home in the bath and she would come in and sink my boats.
Maturity is the ability to reap without apology and not complain when things don't go well.
It is sad to grow old but nice to ripen.