Nicolaus Copernicus — "Mathematics is written for mathematicians."

"The Sun is the center of the universe, and all the planets revolve around it."

"In the middle of all sits the Sun enthroned. In this most beautiful temple, could we place this luminary in any better position from which he can illuminate the whole at once?"

"For it is not necessary that hypotheses should be true, or even probable; it is enough if they provide a calculus which agrees with the observations."

"For it is the duty of an astronomer to compose the history of the celestial motions through careful and expert study."

"It is clear that the earth also moves in a similar manner, and describes an annual course."