Quote

While one finds company in himself and his pursuits, he cannot feel old, no matter what his years may be

None are so old as those who have outlived enthusiasm

Nobody grows old merely by living a number of years. We grow old by deserting our ideals. Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul

I'm not interested in age. People who tell me their age are silly. You're as old as you feel

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

Never explain - your friends do not need it and your enemies will not believe you anyway