Galileo Galilei — "The book of nature is a book of a single language, the language of mathematics."

"It is a false and dangerous opinion that the authority of Scripture should be preferred to the authority of reason."

"All truths are easy to understand once they are discovered; the point is to discover them."

"I consider the best judge to be the one who knows how to listen to both sides."

"The senses, being the interpreters of natural effects, are the only door to scientific knowledge."

"To deny the evidence of one's own eyes, and to prefer to believe a doctrine which is contrary to all experience, shows a mind that is either very dull or very prejudiced."