"Although the whole of this life were said to be nothing but a dream and the physical world nothing but a phantasm, I should call this dream or phantasm real enough, if, using reason well, we were neve…"

"There are two kinds of truths: those of reasoning and those of fact."

"The more perfect a substance is, the more it mirrors the universe."

"The universe, if it were not composed of monads, would be a mere aggregate, not a substance."

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