The beginning, middle, and end of the birth, growth, and perfection of whatever we behold is from contraries, by contraries, and to contraries; and whatever contrariety is, there is action and reaction, there is motion, diversity, multitude, and order, there are degrees, succession and vicissitude.

The universe is then one, infinite, immobile. ... It is not capable of comprehension and therefore is endless and limitless, and to that extent infinite and indeterminable, and consequently immobile.

There is in the universe neither center nor circumference.

I have held and hold souls to be immortal.... Speaking as a Catholic, they do not pass from body to body, but go to paradise, purgatory or hell. But I have reasoned deeply, and, speaking as a philosopher, since the soul is not found without body and yet is not body, it may be in one body or in another, and pass from body to body.

Desire urges me on, while fear bridals me.

God is the universal substance in existing things. He comprises all things. He is the fountain of all being. In Him exists everything that is.

Truth does not change because it is, or is not, believed by a majority of the people.