The soul, in its power, is present in some way in the entire universe, because it apprehends substances which are not included in the body in which it lives, although they are related to it.

Perchance you who pronounce my sentence are in greater fear than I who receive it.

I beg you, reject antiquity, tradition, faith, and authority! Let us begin anew by doubting everything we assume has been proven!

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.

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

There is no absolute up or down, as Aristotle taught; no absolute position in space; but the position of a body is relative to that of other bodies. Everywhere there is incessant relative change in position throughout the universe, and the observer is always at the center of things.

In this infinite space is placed our universe (whether by chance, by necessity, or by providence I do not now consider).