host?

Objection 1: It would seem that the Father and the Son are not one
principle of the Holy Ghost. For the Holy Ghost does not proceed from
the Father and the Son as they are one; not as they are one in nature,
for the Holy Ghost would in that way proceed from Himself, as He is
one in nature with Them; nor again inasmuch as they are united in any
one property, for it is clear that one property cannot belong to two
subjects. Therefore the Holy Ghost proceeds from the Father and the
Son as distinct from one another. Therefore the Father and the Son are
not one principle of the Holy Ghost.

Obj. 2: Further, in this proposition "the Father and the Son are one
principle of the Holy Ghost," we do not designate personal unity,
because in that case the Father and the Son would be one person; nor
again do we designate the unity of property, because if one property
were the reason of the Father and the Son being one principle of the
Holy Ghost, similarly, on account of His two properties, the Father
would be two principles of the Son and of the Holy Ghost, which
cannot be admitted. Therefore the Father and the Son are not one
principle of the Holy Ghost.

Obj. 3: Further, the Son is not one with the Father more than is the
Holy Ghost. But the Holy Ghost and the Father are not one principle
as regards any other divine person. Therefore neither are the Father
and the Son.

Obj. 4: Further, if the Father and the Son are one principle of the
Holy Ghost, this one is either the Father or it is not the Father.
But we cannot assert either of these positions because if the one is
the Father, it follows that the Son is the Father; and if the one is
not the Father, it follows that the Father is not the Father.
Therefore we cannot say that the Father and the Son are one principle
of the Holy Ghost.

Obj. 5: Further, if the Father and the Son are one principle of the
Holy Ghost, it seems necessary to say, conversely, that the one
principle of the Holy Ghost is the Father and the Son. But this seems
to be false; for this word "principle" stands either for the person
of the Father, or for the person of the Son; and in either sense it
is false. Therefore this proposition also is false, that the Father
and the Son are one principle of the Holy Ghost.

Obj. 6: Further, unity in substance makes identity. So if the Father
and the Son are the one principle of the Holy Ghost, it follows that
they are the same principle; which is denied by