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

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.

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

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

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

Old age comes on suddenly, and not gradually as is thought.

None are so old as those who have outlived enthusiasm.

Old minds are like old horses you must exercise them if you wish to keep them in working order.

I don't feel old. I don't feel anything till noon. That's when it's time for my nap.

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