What then in the last resort are the truths of mankind? They are the irrefutable errors of mankind.

There is no greatness where there is no simplicity, goodness and truth.

It is not the strength, but the duration, of great sentiments that makes great men.

There are no eternal facts, as there are no absolute truths.

All truly great thoughts are conceived by walking.

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: what can be loved in man is that he is an overture and a going under.