The payment of the worker is not determined by the value of his product.

The school has always been the most important means of transferring the wealth of tradition from one generation to the next. This applies today in an even higher degree than in former times, for through modern development of economic life, the family

In scientific thinking are always present elements of poetry. Science and music requires a thought homogeneous.

The most fundamental question we can ever ask ourselves is whether or not the universe we live in is friendly or hostile.

Growth comes through analogy; through seeing how things connect, rather than only seeing how they might be different.

I refuse to engage in an intellectual battle with an unarmed man.

Great spirits have always encountered opposition from mediocre minds. The mediocre mind is incapable of understanding the man who refuses to bow blindly to conventional prejudices and chooses instead to express his opinions courageously and honestly.