I also readily admit that there are animals, taken in the ordinary sense, that are incomparably larger than those we know of, and I have sometimes said in jest that there might be a system like ours which is the pocketwatch of some enormous giant.

Taking mathematics from the beginning of the world to the time when Newton lived, what he had done was much the better half.

Nothing is necessitated whose opposite is possible.

And there must be simple substances, because there are compounds; for the compound is nothing but a collection or aggregatum of simples.

Philosophy consists mostly of kicking up a lot of dust and then complaining that you can't see anything.

Every substance is as a world apart, independent of everything else except God.

We may say, that not only the soul (the mirror of an indestructible universe) is indestructible, but also the animal itself is, although its mechanism is frequently destroyed in parts.