Any man who can drive safely while kissing a pretty girl is simply not giving the kiss the attention it deserves.

The fact that man produces a concept "I" besides the totality of his mental and emotional experiences or perceptions does not prove that there must be any specific existence behind such a concept. We are succumbing to illusions produced by our self-created language, without reaching a better understanding of anything. Most of so-called philosophy is due to this kind of fallacy.

Even though the realms of religion and science in themselves are clearly marked off from each other, nevertheless there exist between the two strong reciprocal relationships and dependencies.

The more I learn of physics, the more I am drawn to metaphysics.

The more cruel the wrong that men commit against an individual or a people, the deeper their hatred and contempt for their victim.

If you cannot explain it simply, you do not understand it enough.

Every serious scientific worker is painfully conscious of this involuntary relegation to an ever-narrowing sphere of knowledge, which threatens to deprive the investigator of his broad horizon and degrades him to the level of a mechanic.