It was granted to me alone to discover all the new phenomena in the sky and nothing to anybody else. This is the truth which neither envy nor malice can supress.

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

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

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

To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement 'I do not know'.

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.

God is known by nature in his works, and by doctrine in his revealed word.