Old age and treachery will always beat youth and exuberance.

That's the trouble with you young people. You think because you ain't been here long, you know everything. In my life I already forgot more than you ever know.

When you're young, the question is "What can you do for me?" and when you're old the question is "What can I do for you?"

As we grow old the vigour of youth is exchanged for life experience and wisdom.

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

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