What I am asking is what do you believe was His ultimate purpose in creating the angels and the humans?
I believe it's about love. He created all beings with free choice including the heavenly beings. One can not have true love without choice. One can not force one to love another.
John 17 (Jesus prayed)
24 Father, I want those You have given Me to be with Me where I am, that they may see the glory You gave Me because You loved Me before the foundation of the world.
1 Corinthians 13
13 Three things will last forever--faith, hope, and love--
and the greatest of these is love.
God is love.
1 John 4
15 If anyone confesses that Jesus is the Son of God, God abides in him, and he in God.
16 And we have come to know and believe the love that God has for us.
God is love; whoever abides in love abides in God, and God in him.
God created all to live in perfect love with Him for eternity, by their choice to do so. A mutual loving relationship.
He is glorified (honored) when we love Him.
Revelation 1:6
And made us a kingdom, priests to his God and Father, to him be glory and dominion forever and ever. Amen.
When Gods plan is fully completed and He makes the earth anew. The natural "state" of everything will be in perfect Love. It will not take any effort ... it will just be. AMEN!
We on earth make that choice now. His love will be fully completed through Jesus our Savior ... because of love.