While differing widely in the various little bits we know, in our infinite ignorance we are all equal.

The game of science is, in principle, without end. He who decides one day that scientific statements do not call for any further test, and that they can be regarded as finally verified, retires from the game.

Every genuine test of a theory is an attempt to falsify it, or to refute it.

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

It is part of my thesis that all our knowledge grows only through the correcting of our mistakes.

Science must begin with myths, and with the criticism of myths.

Instead of encouraging the student to devote himself to his studies for the sake of studying, instead of encouraging in him a real love for his subject and for inquiry, he is encouraged to study for the sake of his personal career; he is led to acquire only such knowledge as is serviceable in getting him over the hurdles which he must clear for the sake of his advancement.