God, possessing supreme and infinite wisdom, acts in the most perfect manner, not only metaphysically, but also morally speaking, and ... with respect to ourselves, we can say that the more enlightened and informed we are about God's works, the more we will be disposed to find them excellent and in complete conformity with what we might have desired.

Every present state of a simple substance is the natural consequence of its preceding state, in such a way that its present is big with its future.

There is nothing without reason.

It is worth noting that the notation facilitates discovery. This, in a most wonderful way, reduces the mind's labour.

The art of discovering the causes of phenomena, or true hypotheses, is like the art of deciphering, in which an ingenious conjecture often greatly shortens the road.

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.

God makes nothing without order, and everything that forms itself develops imperceptibly out of small parts.