The idealist is incorrigible: if he is thrown out of his heaven he makes an ideal of his hell.

He who lives as children live - who does not struggle for his bread and does not believe that his actions possess any ultimate significance - remains childlike.

It is not the strengths, but the durations of great sentiments that make great men.

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.

There are no facts, only interpretations.

Indeed, what forces us at all to suppose that there is an essential opposition of 'true' and 'false'? Is it not sufficient to assume degrees of apparentness and, as it were, lighter and darker shadows and shades of appearance- different 'values', to use the language of painters?

What the philosopher is seeking is not truth, but rather the metamorphosis of the world into man.