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

"I consider the sun's axial rotation to be an excellent argument for the diurnal rotation of the earth."

"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 deeper I go into the sciences, the more I am convinced that the world is the work of an all-wise Creator."

"It is a great pity that there are so few who are interested in the true causes of things."