It was Christianity which first painted the devil on the worlds walls; It was Christianity which first brought sin into the world. Belief in the cure which it offered has now been shaken to it's deepest roots; but belief in the sickness which it taught and propagated continues to exists.

If an architect wants to strengthen a decrepit arch, he increases the load laid upon it, for thereby the parts are joined more firmly together.

Every past is worth condemning.

The most unambiguous sign that a person holds men in low esteem is this, that he either acknowledges them merely as means to his ends or does not acknowledge them at all.

Truth will have no gods before it.- The belief in truth begins with the doubt of all truths in which one has previously believed.

Since Copernicus, man seems to have got himself on an inclined plane-now he is slipping faster and faster away from the center into-what? into nothingness? into a 'penetrating sense of his nothingness?' ... all science, natural as well as unnatural-which is what I call the self-critique of knowledge-has at present the object of dissuading man from his former respect for himself, as if this had been but a piece of bizarre conceit.

Everyone needs a sense of shame, but no one needs to feel ashamed.