In questions of science the authority of a thousand is not worth the humble reasoning of a single individual.

If you could see the earth illuminated when you were in a place as dark as night, it would look to you more splendid than the moon.

My dear Kepler, what would you say of the learned here, who, replete with the pertinacity of the asp, have steadfastly refused to cast a glance through the tel…

I never met a man so unknowledgeable, I could not learn something from him.

For I am not so enamored of my own opinions that I disregard what others may think of them. I am aware that a philosopher's ideas are not subject to the judgme…

There is no democracy in physics. We can't say that some second-rate guy has as much right to opinion as Fermi.

As for science and religion, the known and admitted facts are few and plain enough. All that the parsons say is unproved. All that the doctors say is disproved…