Insight must precede application.

An important scientific innovation rarely makes its way by gradually winning over and converting its opponents: What does happen is that the opponents gradually die out.

A new truth always has to conend with many difficulties. If it were not so, it would have been discovered much sooner.

No burden is so heavy for a man to bear as a succession of happy days.

Scientific discovery and scientific knowledge have been achieved only by those who have gone in pursuit of it without any practical purpose whatsoever in view.

Anybody who has been seriously engaged in scientific work of any kind realizes that over the entrance to the gates of the temple of science are written the words: 'Ye must have faith.'

In all my research I have never come across matter. To me the term matter implies a bundle of energy which is given form by an intelligent spirit.