I Think That In The Discussion Of

In The Long Run My Observations Have Convinced Me That Some Men, Reasoning Preposterously, First Establish Some Conclusion In Their Minds Which, Either Because Of Its Being Their Own Or Because Of Their Having Received It From Some Person Who Has Their Entire Confidence, Impresses Them So Deeply That One Finds It Impossible Ever To Get It Out Of Their Heads.

I, Galileo, Son Of The Late Vicenzo Galilei, Swear That I Never Said That The Prime Numbers Are Useless. What I Said Was That You Cannot Count Lunar Craters By Counting 2, 3, 5, 7.

All Truths Are Easy To Understand Once They Are Discovered; The Point Is To Discover Them.

Philosophy Itself Cannot But Benefit From Our Disputes, For If Our Conceptions Prove True, New Achievements Will Be Made; If False, Their Refutation Will Further Confirm The Original Doctrines.

Some, Merely To Contradict What I Had Said, Did Not Scruple To Cast Doubt Upon Things They Had Seen With Their Own Eyes Again And Again.