Thought is the organizing factor in man, intersected between the causal primary instincts and the resulting actions.

Thanks to my fortunate idea of introducing the relativity principle into physics, you (and others) now enormously overrate my scientific abilities, to the point where this makes me quite uncomfortable.

Politics is a pendulum whose swings between anarchy and tyranny are fueled by perennially rejuvenated illusions.

Those who manage their way into a crisis are not necessarily the right people to manage their way out of a crisis

But in physics I soon learned to scent out the paths that led to the depths, and to disregard everything else, all the many things that clutter up the mind, and divert it from the essential. The hitch in this was, of course, the fact that one had to cram all this stuff into one's mind for the examination, whether one liked it or not.

Human beings, in their thinking, feeling and acting are not free agents but are as causally bound as the stars in their motion.

How insidious Nature is when one is trying to get at it experimentally.