“If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.”
“I've loved the stars too fondly to be fearful of the night”
“All truths are easy to understand once they are discovered; the point is to discover them.”
“I have never met a man so ignorant that I couldn't learn something from him.”
You cannot teach a man anything; you can only help him find it within himself.
Detractors of corruptibility deserve being turned into statues.
I do not feel obliged to believe that the same God who has endowed us with senses, reason, and intellect has intended us to forgo their use and by some other means to give us knowledge which we can attain by them.
I have for many years been a partisan of the Copernican view because it reveals to me the causes of many natural phenomena that are entirely incomprehensible in the light of the generally accepted hypothesis. To refute the latter I have collected many proofs, but I do not publish them, because I am deterred by the fate of our teacher Copernicus who, although he had won immortal fame with a few, was ridiculed and condemned by countless people (for very great is the number of the stupid).
"Propositions arrived at by purely logical means are completely empty as regards reality. Because Galileo realised this, and particularly because he drummed it into the scientific world, he is the father of modern physics—indeed, of modern science altogether."