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You only mature when you face problems you can't deal with.

You can only be young once. But you can always be immature.

I feel more mature than most people my age.

You're only young once, but you can be immature forever.

There's a part of you that always remains a child, no matter how mature you get, how sophisticated or weary.

One should mature over 20 years.

I think part of maturity is knowing who you are.

When you have a kid, you have to be more mature.

Age does not make us childish, as some say; it finds us true children.