Forty is the old age of youth, fifty is the youth of old age.

Youth is the gift of nature, but age is a work of art.

None are so old as those who have outlived enthusiasm.

Every man over forty is a scoundrel.

Age is an issue of mind over matter. If you don't mind, it doesn't matter.

As I grow older, I pay less attention to what men say. I just watch what they do.

Youth is when you're allowed to stay up late on New Year's Eve. Middle age is when you're forced to.

Growing old is no more than a bad habit which a busy person has no time to form.

Age appears to be best in four things old wood best to burn, old wine to drink, old friends to trust, and old authors to read.

None are so old as those who have outlived enthusiasm.