Gottfried Wilhelm Leibniz — "There is nothing in the intellect that was not previously in the senses, except …"

"A great doctor kills more people than a great general."

"It is God who is the ultimate reason things, and the Knowledge of God is no less the beginning of science than his essence and will are the beginning of things."

"The happiness of a fool would be unbearable."

"I maintain that the universe is a kind of clock, wound up by God, and that it runs without His further interference."

"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…"