Interesting Steve. While you mention it, I think of two passages that may help us out. Compare the following two:
Ephesians 2:4-10
4 but God, being rich in mercy, for his great love wherewith he loved us, 5 even when we were dead through our trespasses, made us alive
together with Christ (by grace have ye been saved),
6 and raised us
up with him, and made us to sit with him in the heavenly [places], in Christ Jesus:
Eph. 1:19-21
19These are in accordance with the working of the strength of His might 20 which He brought about in Christ, when He raised Him from the dead and seated Him at His right hand in the heavenly places, 21 far above all rule and authority and power and dominion, and every name that is named, not only in this age but also in the one to come.
Two things come to mind.
1) It appears that our position in consequence on our union in the death, burial, resurrection, and ascension/enthronement with Christ parallels to that which Christ has with His Father as He is seated with Him on His throne. This is a plausible explanation.
2) It could as be that since God is Spirit, Christ has indeed sat down on His Father's throne. The Father is in the Son. They are one in essence and unity. For in Him (Christ) dwells the fullness of the Godhead bodily.
John 17:1-5
These things spake Jesus; and lifting up his eyes to heaven, he said, Father, the hour is come; glorify thy Son, that the son may glorify thee: 2 even as thou gavest him authority over all flesh, that to all whom thou hast given him, he should give eternal life. 3 And this is life eternal, that they should know thee the only true God, and him whom thou didst send, [even] Jesus Christ. 4 I glorified thee on the earth, having accomplished the work which thou hast given me to do. 5 And now, Father, glorify thou me with thine own self with the glory which I had with thee before the world was.
The following comes from
here
Temple Vision
New religious movements like the Jehovah's Witnesses take it for granted that Jehovah, the God of the Old Testament, is the 'Father-only.' The classic proof that the God of the Old Testament is Father, Son and Holy Spirit, not 'Father-only', comes from Isaiah 6:1-3, combined with John 12:41 and Acts 28:25. Isaiah saw God in the temple:
"In the year that king Uzziah died I saw also the Lord sitting upon a throne, high and lifted up, and his train filled the temple. Above it stood the seraphims: each one had six wings; with twain he covered his face, and with twain he covered his feet, and with twain he did fly. And one cried unto another, and said, Holy, holy, holy, is the LORD of hosts: the whole earth is full of his glory." (Isaiah 6:1-3).
Whom did Isaiah see? John the evangelist says he saw Christ. After quoting Isaiah 6:9-10, he says, "These things said Esaias, when he saw his [Christ's] glory, and spake of him. Nevertheless among the chief rulers also many believed on him; but because of the Pharisees they did not confess him, lest they should be put out of the synagogue..." (John 12:41-42). Paul quotes the same passage, attributing the LORD's words to the Holy Spirit:
"So when they did not agree among themselves, they departed after Paul had said one word: 'The Holy Spirit spoke rightly through Isaiah the prophet to our fathers, saying, "Go to this people and say: 'Hearing you will hear, and shall not understand; and seeing you will see, and not perceive; for the hearts of this people have grown dull. Their ears are hard of hearing, and their eyes they have closed, lest they should see with their eyes and hear with their ears, lest they should understand with their hearts and turn, so that I should heal them.'" (Acts 28:25-27).
Q.E.D. - the God of the Old Testament, the LORD of hosts, is the Father, Son and Holy Spirit, not 'Father-only'.[/b]