Galileo Galilei — "With the telescope, I have discovered many things that contradict the ideas of a…"

"Who would set a limit to the mind of man? Who would dare assert that we know all there is to be known?"

"I cannot but be astonished that Sarsi should persist in trying to prove by means of witnesses something that I may see for myself at any time by means of experiment. Witnesses are examined in doubtful…"

"I do not believe that the same God who has given us senses, reason and intellect would have us abandon their use."

"You cannot teach a man anything; you can only help him find it within himself."

"I think that in the discussion of natural problems we ought not to begin at the authority of places of Scripture, but at sensible experiments and necessary demonstrations."