Milt Rodriguez has posted a great article with this title on his blog ‘The Rebuilders’. I heartily commend it as it has some useful thoughts on the church and on Christ while focussing especially on the glory of the Almighty.
God still wanted an expression, an outflowing expression of the love for His Son. The expression would need to be corporate because God is corporate: Father, Son, and Spirit and yet one God!
So what did He decide to do? Well, the answer to that is beyond all logic, theology, and human understanding.
He decided to expand His one and only Son into many sons! Yes, that’s right. He decided to make His one and only Son into a corporate Son.
I encourage you to read Milt’s post in full.