Why do not all souls act like the universal Soul? They do act like her, but do so only in the place where they are. Why do our bodies not move in a circle, like the heavens? Because they include an element whose natural motion is rectilinear; because they trend towards other objects, because the spherical element[315] in us can no longer easily move in a circle, because it has become terrestrial, while in the celestial region is was light and movable enough. How indeed could it remain at rest, while the Soul was in motion, whatever this movement was? This spirit(ual body) which, within us, is spread around the soul, does the same thing as do the heavens. Indeed, if the divinity be in everything, the Soul, which desires to unite herself to Him, must move around Him, since He resides in no determinate place. Consequently, Plato attributes to the stars, besides the revolution which they perform in common with the universe, a particular movement of rotation around their own centre. Indeed, every star, in whatever place it may be, is transported with joy while embracing the divinity; and this occurs not by reason, but by a natural necessity. HOW MOTION IS IMPARTED TO LOWER EXISTENCES. 3. One more subject remains to be considered. The lowest power of the universal Soul (the inferior soul),[316] rests on the earth, and thence radiates abroad throughout the universe. The (higher, or celestial) power (of the world-Soul) which, by nature, possesses sensation, opinion, and reasoning, resides in the celestial spheres, whence it dominates the inferior power, and communicates life to it. It thereby moves the inferior power, embracing it in a circle; and it presides over the universe as it returns (from the earth) to the celestial spheres. The inferior power, being circularly embraced by the superior power, reflects upon itself, and thus operates on itself a conversion by which it imparts a movement of rotation to the body within which it reacts. (This is how motion starts) in a sphere that is at rest: as soon as a part moves, the movement spreads to the rest of it, and the sphere begins to revolve. Not otherwise is our body; when our soul begins to move, as in joy, or in the expectation of welfare, although this movement be of a kind very different from that natural to a body, this soul-movement produces local motion in the body. Likewise the universal Soul, on high, while approaching the Good, and becoming more sensitive (to its proximity), thereby impresses the body with the motion proper to it, namely, the local movement. (Our own human) sense-(faculty), while receiving its good from above, and while enjoying the pleasures proper to its nature, pursues the Good, and, inasmuch as the Good is everywhere present, it is borne everywhere. The intelligence is moved likewise; it is simultaneously at rest and in motion, reflecting upon itself. Similarly the universe moves in a circle, though simultaneously standing still. THIRD ENNEAD, BOOK FOUR.