"I cannot but be astonished that Sarsi should persist in trying to prove by means of witnesses something that I may see for myself at any time by means of experiment. Witnesses are examined in doubtful…"

"I hold the sun to be situated motionless in the center of the revolution of the celestial orbs while the earth revolves around the sun."

"Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not."

"That man will be very fortunate who, led by some unusual inner light, shall be able to turn from the dark and confused labyrinths within which he might have gone forever wandering with the crowd and b…"

"The universe is an immense, eternal, and infinite work, which can be understood only by the one who created it."