Reason is intuition's servant.

One cannot deal with a problem with the same thinking that creates it.

Philosophers play with the word, like a child with a doll.... It does not mean that everything in life is relative.

Democracy, taken in its narrower, purely political, sense, suffers from the fact that those in economic and political power possess the means for molding public opinion to serve their own class interests. The democratic form of government in itself does not automatically solve problems; it offers, however, a useful framework for their solution. Everything depends ultimately on the political and moral qualities of the citizenry.

The only sure way to avoid making mistakes is to have no new ideas.

Ethical axioms are found and tested not very differently from the axioms of science. Truth is what stands the test of experience.

No scientist thinks in formulae.