But don't despise error. When touched by genius, when led by chance, the most superior truth can come into being from even the most foolish error. The important inventions which have been brought about in every realm of science from false hypotheses number in the hundreds, indeed in the thousands.

Decisive inventions and discoveries always are initiated by an intellectual or moral stimulus as their actual motivating force, but, usually, the final impetus to human action is given by material impulses ... merchants stood as a driving force behind the heroes of the age of discovery; this first heroic impulse to conquer the world emanated from very mortal forces

I had learned and written too much history not to know that the great masses always and at once respond to the force of gravity in the direction of the powers that be. I knew that the same voices which yelled "Heil Schuschnigg" today would thunder "Heil Hitler" tomorrow.

One never gets to know a person's character better than by watching his behavior during decisive moments.... It is always only danger which forces the most deeply hidden strengths and abilities of a human being to come forth.

But, in history, practical usefulness never determines the moral value of an achievement. Only the person who increases the knowledge humanity has about itself and enhances its creative consciousness permanently enriches humanity.

It is a law of life that human beings, even the geniuses among them, do not pride themselves on their actual achievements but thatthey want to impress others, want to be admired and respected because of things of much lower import and value.

For the more a man limits himself, the nearer he is on the other hand to what is limitless; it is precisely those who are apparently aloof from the world who build for themselves a remarkable and thoroughly individual world in miniature, using their own special equipment, termit-like.