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

My mind is my laboratory.

All that's different about me is that I still ask the questions most people stopped asking at age five.

The bitter and the sweet come from the outside, the hard from within, from one's own efforts.

Fear or stupidity has always been the basis of most human actions.

Creating a new theory is not like destroying an old barn and erecting a skyscraper in its place. It is rather like climbing a mountain and gaining new and wider views.

Humiliation and mental oppression by ignorant and selfish teachers wreak havoc in the youthful mind that can never be undone and often exert a baleful influence in later life.