He who understands Archimedes and Apollonius will admire less the achievements of the foremost men of later times.

He who hasn't tasted bitter things hasn't earned sweet things.

But in simple substances the influence of one monad over another is ideal only.

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

There is a certain destiny of everything, regulated by the foreknowledge and providence of God in His works.

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.

To love is to take delight in happiness of another, or, what amounts to the same thing, it is to account another's happiness as one's own.