Plotinos: Complete Works, v. 1 In Chronological Order,...

Nor does the universal Soul remain at rest, but enters in motion to beget an image of herself. On the one hand, it is by contemplation of the principle from which she proceeds that she achieves fulness; on the other hand, it is by advancing on a path different from, and opposed to (the contemplation of Intelligence), that she begets an image of herself, sensation, and the nature of growth.268 Nevertheless, nothing is detached or separated from the superior principle which begets her. Thus the human soul seems to reach down to within that of (plant) growth.269 She descends therein inasmuch as the plant derives growth from her. Nevertheless it is not the whole soul that passes into the plant. Her presence there is limited to her descent towards the lower region, and in so far as she produces another hypostatic substance, by virtue of her procession, which occurs by her condescension to care for the things below her. But the higher part of the Soul, that which depends on Intelligence, allows the Intelligence to remain within itself....