Genuine historical knowledge requires nobility of character, a profound understanding of human existence - not detachment and objectivity.

And let that day be lost to us on which we did not dance once! And let that wisdom be false to us that brought no laughter with it!

Those who cannot understand how to put their thoughts on ice should not enter into the heat of debate.

The value of life itself cannot be estimated.

With regard to philosophical metaphysics, I always see increasing numbers who have attained to the negative goal, but as yet few who climb a few rungs backwards; one ought to look out, perhaps, over the last steps of the ladder, but not try to stand upon them.

A sure way to irritate people and to put evil thoughts into their heads is to keep them waiting a long time. This makes them immoral.

What, then is truth?... Truths are illusions about which one has forgotten that this is what they are.