I do not know what to say in a case so surprising, so unlooked for and so novel.

Scripture is a book about going to Heaven. It's not a book about how the heavens go.

In the sciences, the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.

Philosophy [nature] is written in that great book which ever is before our eyes -- I mean the universe -- but we cannot understand it if we do not first learn the language and grasp the symbols in which it is written. The book is written in mathematical language, and the symbols are triangles, circles and other geometrical figures, without whose help it is impossible to comprehend a single word of it; without which one wanders in vain through a dark labyrinth.

I have never met a man so ignorant that I couldn't learn something from him.

Vision, I say, is related to light itself. But of this sensation and the things pertaining to it, I pretend to understand but little; and since even a long time would not suffice to explain that trifle, or even to hint at an explanation, I pass over this in silence.

Mathematics is the language with which God has written the universe.