When we enter a new situation in life and are confronted by a new person, we bring with us the prejudices of the past and our previous experiences of people. These prejudices we project upon the new person. Indeed, getting to know a person is largely a matter of withdrawing projections; of dispelling the smoke screen of what we imagine he is like and replacing it with the reality of what he is actually like.

Those who promise us paradise on earth never produced anything but a hell.

You cannot have a rational discussion with a man who prefers shooting you to being convinced by you.

The history of science is everywhere speculative. It is a marvelous hiatory. It makes you proud to be a human being.

The best thing that can happen to a human being us to find a problem, to fall in love with that problem, and to live trying to solve that problem, unless another problem even more lovable appears.

We hate the very idea that our own ideas may be mistaken, so we cling dogmatically to our conjectures.

For myself, I am interested in science and in philosophy only because I want to learn something about the riddle of the world in which we live, and the riddle of man's knowledge of that world. And I believe that only a revival of interest in these riddles can save the sciences and philosophy from an obscurantist faith in the expert's special skill and in his personal knowledge and authority.