"The world is not a heap of atoms, but a system of monads."

"I hold that the mark of a genuine idea is that its possibility can be proved, either a priori by conceiving its cause or reason, or a posteriori when experience teaches us that it is actual in nature."

"Philosophy consists mostly of kicking up a lot of dust and then complaining that you can't see anything."

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

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