The tyranny of the ignoramuses is insurmountable and assured for all time.

If you want different results, do not do the same things.

Marie Curie is, of all celebrated beings, the only one whom fame has not corrupted.

Epistemology without contact with science becomes an empty scheme. Science without epistemology is-insofar as it is thinkable at all-primitive and muddled.

The truth of a theory can never be proven, for one never knows if future experience will contradict its conclusions.

The most beautiful thing we can experience is the mysterious. It is the source of all true art and science. He to whom the realm of the spirit for your own personal joy and to the profit of the community to which your later work belongs.

I believe that the first step in the setting of a real external world is the formation of the concept of bodily objects and of bodily objects of various kinds.