Plotinos: Complete Works, v. 2 In Chronological Order,...

We have just explained that, when the body participates in the soul, the soul does not somehow go beyond herself to enter into the body, that it is on the contrary the body which enters into the soul, on participating in life, or evidently, when the ancient philosophers say that the soul comes into the body, this means that the body enters into essence, and participates in the life and the soul; in one word, to "come" does not here signify passing from one place into another, but indicates in what way the soul enters into dealings with the body. Therefore "to descend" means, for the soul, to grow into a body, in the sense in which we have explained it; that means, to give the body something of the soul, and not for the soul to become (the property) of the body. Consequently, the soul's issuing from the body must again mean that the body ceases to participate in life.