Reply Obj. 1: Christ's humanity according to the conditions of His nature has not the glory or honor of the Godhead, which it has nevertheless by reason of the Person with whom it is united. Hence Damascene adds in the passage quoted: "In which," that is, in the glory of the Godhead, "the Son of God existing before ages, as God and consubstantial with the Father, sits in His conglorified flesh; for, under one adoration the one hypostasis, together with His flesh, is adored by every creature."
Reply Obj. 2: Christ as man is subject to the Father, if "as" denote the condition of nature: in which respect it does not belong to Him as man to sit at the Father's right hand, by reason of their mutual equality. But it does thus belong to Him to sit at the right hand of the Father, according as is thereby denoted the excellence of beatitude and His judiciary power over every creature.
Reply Obj. 3: It does not belong to Christ's human nature to be in equality with the Father, but only to the Person who assumed it; but it does belong even to the assumed human nature to share in God's mightier gifts, in so far as it implies exaltation above other creatures. _______________________
FOURTH ARTICLE [III, Q. 58, Art. 4]
Whether It Is Proper to Christ to Sit at the Right Hand of the Father?
Objection 1: It would seem that it is not proper to Christ to sit at the right hand of the Father, because the Apostle says (Eph. 2:4, 6): "God . . . hath raised us up together, and hath made us sit together in the heavenly places through Christ Jesus." But to be raised up is not proper to Christ. Therefore for like reason neither is it proper to Him to sit "on the right hand" of God "on high" (Heb. 1:3).
Obj. 2: Further, as Augustine says (De Symb. i): "For Christ to sit at the right hand of the Father, is to dwell in His beatitude." But many more share in this. Therefore it does not appear to be proper to Christ to sit at the right hand of the Father.
Obj. 3: Further, Christ Himself says (Apoc. 3:21): "To him that shall overcome, I will give to sit with Me in My throne: as I also have overcome, and am set down with My Father in His throne." But it is by sitting on His Father's throne that Christ is seated at His right hand. Therefore others who overcome likewise, sit at the Father's right hand.
Obj. 4: Further, the Lord says (Matt. 20:23): "To sit on My right or left hand, is not Mine to give to you, but to them for whom it is prepared by My Father." But no purpose would be served by saying this, unless it was prepared for some. Consequently, to sit at the right hand is not proper to Christ.
On the contrary, It is written (Heb. 1:13): "To which of the angels said He at any time: Sit thou on My right hand, i.e. 'in My mightier gifts,'" or "'as my equal in the Godhead'"? [*The comment is from the gloss of Peter Lombard] as if to answer: "To none." But angels are higher than other creatures. Therefore, much less does it belong to anyone save Christ to sit at the Father's right hand.