It is the theory which decides what we can observe

The height of stupidity is most clearly demonstrated by the individual who ridicules something he knows nothing about.

Only in mathematics and physics was I, through self-study, far beyond the school curriculum, and also with regard to philosophy as it was taught in the school curriculum.

To the extent math refers to reality, we are not certain to the extent we are certain, math does not refer to reality.

If you're not sure why you're doing something, you can never do enough of it. Imagination is more important than knowledge.

Nothing happens until something moves.

It is only to the individual that a soul is given. And the high destiny of the individual is to serve rather than to rule, or to impose himself in any other way.