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

"Aristotle was indeed a great man, and his writings are excellent; but he was a man, and not a god."

"I do not think it is necessary to believe that the same God who gave us our senses, our reason, and our intellect, also intended us to forego their use."

"My dear Kepler, what would you say of the learned here, who, replete with the pertinacity of the asp, have steadfastly refused to cast a glance through the telescope? What shall we make of this? Shall…"

"The universe is an immense, an incomparable, and an inexhaustible library."