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

None are so old as those who have outlived enthusiasm.

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

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.

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

A man growing old becomes a child again.

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

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

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

Age is not a particularly interesting subject. Anyone can get old. All you have to do is live long enough.