Truly novel inventions emerge only in one's youth. Later one becomes ever more experienced, famous-and foolish.

In matters of trust and justice there can be no distinction between big problems and small, for the general principles which determine the conduct of men are indivisible. Whoever is careless with the truth in small matters cannot be trusted in important affairs.

Show me a satisfied man, and I'll show you a failure.

A man who is convinced of the truth of his religion is indeed never tolerant. At the least, he is to feel pity for the adherent of another religion but usually it does not stop there. The faithful adherent of a religion will try first of all to convince those that believe in another religion and usually he goes on to hatred if he is not successful. However, hatred then leads to persecution when the might of the majority is behind it.

There is possibility in every difficulty.

Everything is energy and that’s all there is to it.

The only real valuable thing is intuition. The intellect has little to do on the road to discovery