“I have never met a man so ignorant that I couldn't learn something from him.”

“We cannot teach people anything, we can only help them discover it within themselves.”

“By denying scientific principles, one may maintain any paradox.”

“It is surely harmful to souls to make it a heresy to believe what is proved.”

“Measure what can be measured, and make measurable what cannot be measured.”

"The Bible shows the way to go to heaven, not the way the heavens go."

"Where the senses fail us, reason must step in."

“It is a beautiful and delightful sight to behold the body of the Moon.”

"We must say that there are as many squares as there are numbers."

“You cannot teach a man anything, you can only help him find it within himself.”