1 COR 15:20-28
[1 Cor 15:20-28]:
(v. 20) "But Christ has indeed been raised from the dead,
Expositors:
"Verse 27 makes clear that in the 'all things' God the Father is not made subject to Christ. On the other hand, v. 28 suggests that the Son in a certain sense will be made subject to God the Father. That this does not mean inferiority of person or nature is shown by the future tense of the verb: 'the Son himself will be made subject.' If there were inherent inferiority, the present tense would be expected - i.e., 'he is ever subjected to the Father.'
[If Christ was ever equal with the Father, i.e., if He is God,
(and He is Phil 2:6-8 = jn1a.htm#phil2v8),
then He could not by definition be made inferior to God at anytime being immutable]
But the future aspect of Christ's subjection to the Father must rather be viewed in the light of the adminsitrative process in which the world is brought from its sin and disorder into order by the power of the Son, Who died and was raised and Who then, in the economy of the Godhead, turns it all over to God the Father, the supreme administrative head. All this is to be done so that God will be recognized by all as sovereign, and He - the triune God - will be supreme (cf. Rev 22:3-5). Consider that an individual man could have a number of personalities such as husband, son and friend. At such times that his duty to his wife becomes paramount for example, he must then subject his son and friend personality to his husband personality. So it is very possible in the finite life of a human being that one or more personalities of an individual might be in administrative subjectivity to another. In a similar way is this possible with God Who it is clear from Scripture has three Personalities, God the Father, God the Son and God the Holy Spirit
http://www.biblestudymanuals.net/trinitytc.htm