“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.”

“Even the most eminent persons are subject to the laws of gravity.”

“If your car could travel at the speed of light, would your headlights work?”

“The atom cannot disobey the law. Whether it is the mental or the physical atom, it must obey the law. "What is the use of [external restraint]?"”