“We, on the other hand, must take for granted that the things that exist by nature are, either all or some of them, in motion.”

“Definition of tragedy: A hero destroyed by the excess of his virtues”

“A body in motion can maintain this motion only if it remains in contact with a mover.”

“For any two portions of fire, small or great, will exhibit the same ratio of solid to void; but the upward movement of the greater is quicker than that of the less, just as the downward movement of a mass of gold or lead, or of any other body endowed with weight, is quicker in proportion to its size.”

“Something is infinite if, taking it quantity by quantity, we can always take something outside.”

“I had a feeling once about mathematics - that I saw it all... but it was after dinner and I let it go.”

“The natural man inevitably rebels against mathematics, a mild form of torture that could only be learned by painful processes of drill.”

“As you are entered with the class of Nat. philosophy, give to it the hours of lecture, but devote all your other time to Mathematics, avoiding company as the bane of all progress.”