A person is always startled when he hears himself seriously called an old man for the first time.

The young man knows the rules, but the old man knows the exceptions.

Science is a first-rate piece of furniture for a man's upper chamber, if he has common sense on the ground-floor. But if a man hasn't got plenty of good common sense, the more science he has, the worse for his patient.

I think that, as life is action and passion, it is required of a man that he should share the passion and action of his time at peril of being judged not to have lived.

A great calamity is as old as the trilobites an hour after it has happened.

There is no friend like an old friend who has shared our morning days, no greeting like his welcome, no homage like his praise.