To understand the Universe, you must understand the language in which it's written, the language of Mathematics.

I do not feel obliged to believe that the same God who has endowed us with senses, reason, and intellect has intended us to forego their use.

Philosophy is written in that great book which ever lies 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.

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

I do not think it is necessary to believe that the same God who has given us our senses, reason, and intelligence wished us to abandon their use, giving us by some other means the information that we could gain through them.

We must say that there are as many squares as there are numbers.

Who would dare assert that we know all there is to be known?