A physician who treated me as a nervous case for a while said in the end "No! It is not a matter of your nerves; it is I who am nervous".

Man is something that shall be overcome.... Man is a rope, tied between beast and overman -- a rope over an abyss... What is great in man is that he is a bridge and not an end.

One should not be deceived: great spirits are skeptics ... Strength, FREEDOM which is born of the strength and overstrength of the spirit, proves itself by skepticism. Men of conviction are not worthy of the least consideration in fundamental questions of value and disvalue. Convictions are prisons.

Only ideas won by walking have any value.

I devote myself to what I love the most, and for this very reason I hesitate to designate it with lofty words: I do not want to risk believing that it is a sublime compulsion, a law, which I obey: I love what I love the most too much to wish to appear to it as one compelled.

Today a man of knowledge might well feel as though he were God transformed into an animal.

In laughter all that is evil comes together, but is pronounced holy and absolved by its own bliss.