For years I have heard the standard Bernardese on Jesus's two natures and I used to teach exactly the same thing. That is that Jesus, the man, would at times do things AS a man and at other times do things AS God.
Yet in every case we spoke of, it was still the man. For example It was those human legs that trend on the water and it was the human mouth that said to Peter he could come out there too. Yet at the same time we have made a clear distinction between God and humanity. How is it then we can say "As God He walked on water" when it is clear He was still a man?
No. This is wrong. Yes He was God in personal identity while in the form of a man. Yes His Divine nature was present and resident and even in ontological union with the human nature. But I believe the bible shows that when Jesus healed the sick and did miracles He was still acting AS MAN.
Consider that He was a MAN approved by those miracles
Act 2:22 Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as ye yourselves also know:
That Jesus said the works HE did the Disciples would to do
Joh 14:12 Verily, verily, I say unto you, He that believeth on me, the works that I do shall he do also; and greater works than these shall he do; because I go unto my Father.
Why? He told them they needed FAITH to do these things. But when it comes to Jesus doing these things we are saying He was not a man with great faith doing things things but He was God...that seems contradictory if we are to be like Jesus. Jesus had a certain advantage then. He was not a man that had to overcome the flesh and have faith and give His will totally over to God in order to do those things if the common thinking is correct.
No, He came here and was our example. It was through the Humanity, as a man that Jesus said
Luk 4:18 The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised
There'd be no reason to expect that if we have faith like him, live like him and was submitted to the will of God like him that we can do the works that he did if the only reason he was able to do those things is because he was going back and forth from being God to being man. That makes no sense because he never stopped being a man. He never changed forms when he worked miracles. It was still those human hands, feet and voice.
I think it is both theological wrong to say "as man he did, but as God he did" and I think it is dynamically wrong to say that. In other words it leads to doctrinal error, almost a nestorian error that ultimately denies a true Human nature and a Kenosis or emptying of Himself (he had an advantage) and it lends us to believe ultimately that we can't really be like Jesus (other than the fact that he never sinned) in His humanity. In fact this would be the conclusion of the Divine Flesh theory too since we have to wait till the resurrection to attain such a status (which begs the question though, if His flesh was Divine why did he need to be changed after the resurrection?)
Anyways I see this as both a Theological issue and a dynamic faith issue.