whether the soul be a body, and what is the nature and essence of it.

all those named by me do affirm that the soul itself is incorporeal, and by its own nature is in a motion, and in its own self is an intelligent substance, and the living actuality of a natural organical body. the followers of anaxagoras, that it is airy and a body. the stoics, that it is a hot exhalation. democritus, that it is a fiery composition of things which are perceptible by reason alone, the same having their forms spherical and without an inflaming faculty; and it is a body. epicurus, that it is constituted of four qualities, of a fiery quality, of an aerial quality, a pneumatical, and of a fourth quality which hath no name, but it contains the virtue of the sense. heraclitus, that the soul of the world is the exhalation which proceeds from the moist parts of it; but the soul of animals, arising from exhalations that are exterior and from those that are within them, is homogeneous to it.