Psalm 110: 1: A Psalm of David. The LORD said unto my Lord, Sit thou at my right hand, until I make thine enemies thy footstool.
The prophet of God taught us quite clearly that there are not three persons in the Godhead, but that there is one God who expresses Himself in three offices. Furthermore, when looking at Psalm 110, we are not to understand it as implying that there are two lords or two distinct beings in Heaven, for then we would be entangled in the same error as the trinity teaching. What is important to see here in this psalm is that the Father Himself (invisible Spirit Jehovah) is speaking to Jesus (Adonai), who is the visible expression of the invisible God.
Jesus referred to this psalm when addressing the Pharisees in Matthew 22: 41 – 45: While the Pharisees were gathered together, Jesus asked them, Saying, What think ye of Christ? whose son is he? They say unto him, The Son of David. He saith unto them, How then doth David in spirit call him Lord, saying, The LORD said unto my Lord, Sit thou on my right hand, till I make thine enemies thy footstool? If David then call him Lord, how is he his son? As Jesus was the visible expression of the Father on the earth, so Jesus is the visible expression of the Father in Heaven. That is why we must never assume that in Heaven there are two Lords, for such thinking would be equivalent to saying that there are two Sons, just because the Pillar of Fire (the pre-incarnate Jesus) and the corporal body of Jesus can appear simultaneously.
The corporal body of Jesus in Heaven is the visible glorified tabernacle in which the fulness of God’s Spirit dwells. That is why Jesus is not separate to God, nor is He second to God. Whereas we will have glorified bodies animated by the Holy Spirit in Heaven, and yet are distinct beings from God, Jesus is different, for His body is God’s specially created tabernacle to visibly and physically interact among us in Glory.
Paul says something similar to David in 1 Corinthians 15: 27 – 28: For he hath put all things under his feet. But when he saith all things are put under him, it is manifest that he is excepted, which did put all things under him. And when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God may be all in all. God took on the form of human flesh as the man Jesus to do the work of redemption for us; thus behind the man and his human emotions was the very Spirit of the living God. When the price of redemption had been paid on the cross, the body that God dwelt in went to Heaven where it is presently in glorified form.
After the entire work of redemption is complete, God will make all things subservient to the corporal body of Jesus in which He dwells. All things shall be subject to Christ, and the corporal body of Christ shall be subject to the fulness of God’s Spirit that indwells Him. Thus Jesus shall be seated on His Throne as the Son of David, reigning supreme over all things with His Bride; and for all eternity, God will speak and act through the body of Jesus who shall always be God to us (even as He is now), for He will be the visible representation of the invisible God in a body that resembles our very own.