Enneads II.2: About the Movement of the Heavens
Second Ennead, Book Two
1. Why do the heavens move in a circle? Because they imitate Intelligence. But to what does this movement belong? To the Soul, or to the body? Does it occur because the Soul is within the celestial sphere, which tends to revolve about her? Is the Soul within this sphere without being touched thereby? Does she cause this sphere to move by her own motion? Perhaps the Soul which moves this sphere should not move it in the future, although she did so in the past; that is, the soul made it remain immovable, instead of ceaselessly imparting to it a circular movement. Perhaps the Soul herself might remain immovable; or, if she move at all, it will at least not be a local movement.
How can the Soul impart to the heavens a local movement, herself possessing a different kind of motion? Perhaps the circular movement, when considered by itself, may not seem a local movement. If then it be a local movement only by accident, what is its own nature, by itself? It is the reflection upon itself, the movement of consciousness, of reflection, of life; it withdraws nothing from the world, it changes the location of nothing, while embracing all. Indeed, the power which governs the universal Animal (or world) embraces everything, and unifies everything. If then it remained immovable, it would not embrace everything either vitally or locally; it would not preserve the life of the interior parts of the body it possesses, because the bodily life implies movement. On the contrary, if it be a local movement, the Soul will possess a movement only such as it admits of. She will move, not only as soul, but as an animated body, and as an animal; her movement will partake both of the movement proper to the soul, and proper to the body. Now the movement proper to the body is to mobilize in a straight line; the movement proper to the Soul, is to contain; while both of these movements result in a third, the circular movement which includes both transportation and permanence.