“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.”

“The continuum is that which is divisible into indivisibles that are infinitely divisible.”

“The astronomers said, 'Give us matter and a little motion and we will construct the universe. It is not enough that we should have matter, we must also have a single impulse, one shove to launch the mass and generate the harmony of the centrifugal and centripetal forces.' ... There is no end to the consequences of the act. That famous aboriginal push propagates itself through all the balls of the system, and through every atom of every ball.”

“There is no motion in a straight line. A straight line infinitely projected becomes a circle.”

“Motion is always a relative thing. I move in relation to something else. Any particle in this universe can change in relation to any other particle; but take the whole universe as one, and in relation to what can it move? There is nothing besides it. So this infinite Unit is unchangeable, immovable, absolute, and this is the Real Man.”