A sedentary life is the real sin against the Holy Spirit. Only those thoughts that come by walking have any value.

Science offends the modesty of all real women. It makes them feel as though it were an attempt to peek under their skin--or, worseyet, under their dress and ornamentation!

Ultimately, no one can extract from things, books included, more than he already knows.

We must be cruel as well as compassionate: let us guard against becoming poorer than nature is!

But this word will I say to my enemies: What is all manslaughter in comparison with what you have done to me!

Whatever does not kill me makes me stronger.

Man is a rope stretched between the animal and the Superman-a rope over an abyss. A dangerous crossing, a dangerous wayfaring, a dangerous looking-back, a dangerous trembling and halting