"imaginary numbers are a fine and wonderful resource of the divine intellect, almost an amphibian between being and non-being."

"God always chooses the best, and there is no other reason for his choice than the perfection of the chosen."

"every feeling is the perception of a truth..."

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

"Certainly the condition of our affairs [in Europe], slipping as we are into ever greater corruption, seems to be such that we need missionaries from the Chinese who might teach us the use and practice…"