Gottfried Wilhelm Leibniz — "God is the ultimate reason of things."

"The soul is the mirror of an indestructible universe."

"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."

"Each simple substance or Monad is a mirror of the universe according to its point of view."

"For since all the possibles in the understanding of God laid claim to existence in proportion to their perfections, the actual world, as the resultant of all these claims, must be the most perfect pos…"

"The soul follows its own laws, and the body likewise follows its own laws; and they agree with each other in virtue of the pre-established harmony."