Kindliness, friendliness, the courtesy of the heart, are ever-flowing streams of non egoistic impulses, and have given far more powerful assistance to culture than even those much more famous demonstrations which are called pity, mercy, and self-sacrifice.

He who cannot command himself should obey. And many can command themselves, but much is still lacking before they can obey themselves.

The destiny of mankind is arranged for happy moments every life has such but not for happy times.

This demand follows from an insight that I was the first to articulate: that there are no moral facts.

There are people who want to make men's lives more difficult for no other reason than the chance it provides them afterwards to offer their prescription for alleviating life; their Christianity, for instance.

What we do is never understood, but always merely praised or blamed.

A good aphorism is too hard for the tooth of time, and is not worn away by all the centuries, although it serves as food for every epoch.