Galileo Galilei — "The greatest wisdom consists in knowing what is truly useful."

"The deeper I go into the sciences, the more I am convinced that the world is the work of an all-wise Creator."

"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."

"The great book of nature is written in mathematical symbols."

"It is a great error to believe that the truths of faith are in any way contrary to the truths of reason."

"It is necessary to examine the actual structure of the universe, and not to cling to old ideas."