Paidion said:
In all I'd have to say Christ is much more than just an expression.
That may be so. But don't downplay the fact that He is the expression of God. If Jesus hadn't expressed God to us, we would not know what God is really like. Jesus was compassionate, and so we know that God is compassionate. Jesus was the exact expression of [God's] essence. [Hebrews 1:3]. He was so similar to His Father that He said, "He who has seen me has seen the Father."
Wow! How well our Lord Jesus expressed His Father to the world.
Jesus also expressed himself. For example, he expressed his anger when he threw out the money changers.
He said, 'Why do you call me good? No one is good but God alone'. Mr. 10:18 Of course that was his teaching, and it came from God. But the teaching is true. What was God saying? Wasn't Jesus good? Nope. Not compared to God. This is something to bear in mind, for when he returns, he will smite the nations, and tread the wine press of the fury of the wrath of God Almighty. Rev. 19:15
He said, 'I proceeded and came forth from God.' John 8:42 and 'I am ascending to my Father and your Father, to my God and your God.' John 20:17 This is what he said about himself.
Jesus expressed his sorrow, 'my soul is very sorrowful', and going a little further, he fell on his face and prayed, "My Father, if it be possible, let this cup pass from me' Mt. 26:38
Jesus was like the Father, but like he said, 'Truly, truly, I say to you, a servant is not greater than his master; nor is he who is sent greater than he who sent him.' John 13:16 And 'a servant is not above his master', and 'It is enough for the servant to be like his master' Mt. 10:25