None are so old as those who have outlived enthusiasm.

What most persons consider as virtue, after the age of 40 is simply a loss of energy.

Age is a very high price to pay for maturity.

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

Every man over forty is a scoundrel.

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

Old age is like everything else. To make a success of it, you've got to start young.

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

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.