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

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

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

None are so old as those who have outlived enthusiasm.

Wrinkles should merely indicate where smiles have been.

How incessant and great are the ills with which a prolonged old age is replete.

Aging is not lost youth but a new stage of opportunity and strength.

A man growing old becomes a child again.

Like everyone else who makes the mistake of getting older, I begin each day with coffee and obituaries.

I don't believe one grows older. I think that what happens early on in life is that at a certain age one stands still and stagnates.