When asked which dog wins, he reflected for a moment and replied, "The one I feed the most."

Medical science is as yet very imperfectly differentiated from common cure-mongering witchcraft

Man gives every reason for his conduct save one, every excuse for his crimes save one, every plea for his safety save one; and that one is his cowardice

But to admire a strong person and to live under that strong person’s thumb are two different things.

A man's interest in the world is only the overflow from his interest in himself. When you are a child your vessel is not yet full;so you care for nothing but your own affairs. When you grow up, your vessel overflows; and you are a politician, a philosopher, or an explorer and adventurer. In old age the vessel dries up: there is no overflow: you are a child again.

A man thinking or working is always alone, let him be where he will.

The greatest thing in life is to die young - but delay it as long as possible.