The principal mark of genius is not perfection but originality, the opening of new frontiers.
Courage is never to let your actions be influenced by your fears.
“History had a slow pulse; man counted in years, history in generations
I went to Communism as one goes to a spring of fresh water, and I left Communism as one clambers out of a poisoned river strewn with the wreckage of flooded cities and the corpses of the drowned.
“Show us not the aim without the way. For ends and means on earth are so entangled, That changing one, you change the other too;.
“Some of the greatest discoveries...consist mainly in the clearing away of psychological roadblocks which obstruct the approach to reality;
Nothing is more sad than the death of an illusion.
Creative activity could be described as a type of learning process where teacher and pupil are located in the same individual.
The more original a discovery, the more obvious it seems afterwards.