Friedrich Nietzsche

I assess the power of a will by how much resistance, pain, torture it endures and knows how to turn to its advantage.

The desire to annoy no one, to harm no one, can equally well be the sign of a just as of an anxious disposition.

He who cannot give anything away cannot feel anything either.

A teacher must believe in the value and interest of his subject as a doctor believes in health.

That strategy of buy and hold, which is the sound and sensible one for the individual, can have very dangerous and perverse effects for the market as a whole.