"For, when a ship is floating calmly on a smooth sea, and the mariners are thinking of nothing but the voyage, if a sudden storm should strike it, and the ship should be driven by the wind, it is not t…"

"Indeed, I am aware that a philosopher's thoughts are far removed from the judgment of the multitude, for his aim is to seek the truth in all things, to the extent permitted to human reason by God."

"The world is spherical; whether it is finite or infinite is an open question."

"Finally we shall place the Sun himself at the center of the Universe."

"Therefore, if the Earth moved, it would necessarily move with a triple motion: one, the diurnal rotation on its own axis; another, the annual revolution around the Sun; and a third, the motion of its …"