"I also take it for granted that every created thing, and consequently the created monad also, is subject to change, and indeed that this change is continual in each one."

"The universe is a machine divinely constructed."

"I have said that the soul is a little world where distinct ideas represent God and confused ones represent the universe."

"Every mind has a horizon in respect to its present intellectual capacity but not in respect to its future intellectual capacity."

"I maintain that the monads, which are the true atoms of nature, have no windows through which anything could enter or depart."