"There is a certain destiny of everything, regulated by the foreknowledge and providence of God, who has established an infallible connection between the antecedent and the consequent."

"The monads are the substantial atoms of nature."

"Nothing is accomplished all at once, and it is one of my great maxims, and one of the most completely verified, that Nature makes no leaps: a maxim which I have called the law of continuity."

"There is nothing in the intellect that was not previously in the senses, except the intellect itself."

"Why is there something rather than nothing?"