s a medium
between itself and another. But the spirit is nothing else in essence
but the soul itself, as was said above (I, Q. 77, A. 1, ad 1).
Therefore the Son of God did not assume a soul through the medium of
the spirit or mind.

Obj. 2: Further, what is the medium of the assumption is itself more
assumable. But the spirit or mind is not more assumable than the
soul; which is plain from the fact that angelic spirits are not
assumable, as was said above (Q. 4, A. 1). Hence it seems that the
Son of God did not assume a soul through the medium of the spirit.

Obj. 3: Further, that which comes later is assumed by the first
through the medium of what comes before. But the soul implies the
very essence, which naturally comes before its power--the mind.
Therefore it would seem that the Son of God did not assume a soul
through the medium of the spirit or mind.

_On the contrary,_ Augustine says (De Agone Christ. xviii): "The
invisible and unchangeable Truth took a soul by means of the spirit,
and a body by means of the soul."

_I answer that,_ As stated above (A. 1), the Son of God is said to
have assumed flesh through the medium of the soul, on account of the
order of dignity, and the congruity of the assumption. Now both these
may be applied to the intellect, which is called the spirit, if we
compare it with the other parts of the soul. For the soul is assumed
congruously only inasmuch as it has a capacity for God, being in His
likeness: which is in respect of the mind that is called the spirit,
according to Eph. 4:23: "Be renewed in the spirit of your mind." So,
too, the intellect is the highest and noblest of the parts of the
soul, and the most like to God, and hence Damascene says (De Fide
Orth. iii, 6) that "the Word of God is united to flesh through the
medium of the intellect; for the intellect is the purest part of the
soul, God Himself being an intellect."

Reply Obj. 1: Although the intellect is not distinct from the soul in
essence, it is distinct from the other parts of the soul as a power;
and it is in this way that it has the nature of a medium.

Reply Obj. 2: Fitness for assumption is wanting to the angelic
spirits, not from any lack of dignity, but because of the
irremediableness of their fall, which cannot be said of the human
spirit, as is clear from what has been said above (I, Q. 62, A. 8;
First Part, Q. 64, A. 2).

Reply Obj. 3: The soul, between which and the Word of God the
intellect is sai