"Virtue is the habit of acting according to wisdom."

"The monad is nothing but a simple substance that enters into composites."

"Nothing is accomplished all at once, and it is one of my great maxims, and one of the most completely verified, that Nature makes no leaps: a maxim which I have called the law of continuity."

"Pre-established harmony is the only way to explain the agreement of substances without their interaction."

"There is nothing waste, nothing sterile, nothing dead in the universe; no chaos, no confusions, save in appearance."