However far man may extend himself with his knowledge, however objective he may appear to himself - ultimately he reaps nothing but his own biography.

Be robbers and ravagers as long as you cannot be rulers and owners, you men of knowledge! The time will soon be past when you could be content to live concealed in the woods like timid deer!

It is not enough to prove something, one also has to seduce or elevate people to it. That is why the man of knowledge should learn how to speak his wisdom: and often in such a way that it sounds like folly!

No honey is sweeter than that of knowledge.

Once and for all, there are many things I choose not to know.-Wisdom sets limits even to knowledge.

Every extension of knowledge arises from making the conscious the unconscious.