Our reasonings are grounded upon two great principles, that of contradiction, in virtue of which we judge false that which involves a contradiction, and true that which is opposed or contradictory to the false.

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

It has long seemed ridiculous to me to suppose that the nature of things has been so poor and stingy that it provided souls only to such a trifling mass of bodies on our globe, like human bodies, when it could have given them to all, without interfering with its other ends.

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

Nothing is necessitated whose opposite is possible.

I do not conceive of any reality at all as without genuine unity.

Reality cannot be found except in One single source, because of the interconnection of all things with one another.