“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”

“Its as simple as that. Simple and complicated, as most true things are.”

“Truth is ever to be found in the simplicity, and not in the multiplicity and confusion of things.”

“People who pride themselves on their "complexity" and deride others for being "simplistic" should realize that the truth is often not very complicated. What gets complex is evading the truth.”

“The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives.”

“[I]sn't it sad to go to your grave without ever wondering why you were born? Who, with such a thought, would not spring from bed, eager to resume discovering the world and rejoicing to be part of it?”

“I have not yet lost a feeling of wonder, and of delight, that the delicate motion should reside in all the things around us, revealing itself only to him who looks for it.”