There is no matter as such—mind is the matrix of all matter.

An experiment is a question which science poses to Nature and a measurement is the recording of Nature's answer.

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

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

There is a real world independent of our senses; the laws of nature were not invented by man, but forced on him by the natural world. They are the expression of a natural world order.

A scientist is happy, not in resting on his attainments but in the steady acquisition of fresh knowledge.

It is not the possession of truth, but the success which attends the seeking after it, that enriches the seeker and brings happiness to him.