Gottfried Wilhelm Leibniz

God is the first reason of things, for contingent things have their ultimate reason in a necessary substance.

Space is nothing but the order of coexisting phenomena, as time is the order of successive phenomena.

There is no such thing as a vacuum.

The world is not a mere aggregate of atoms, but a system of monads.

The soul is a simple substance, which represents the universe according to its point of view.

The best of all possible worlds.