Rev. Bruce G. Buchanan:
If we reduce the question to (alleged) pictures of “Jesus,”
1) It is, necessarily, a false representation, since he provided us no portrait. Nor the Apostles any description.
2) If the picture is intended to inspire devotion unto its “true representation,” then it is a manifest idolatry of the kind, being a human invention.
3) If the picture is not intended to inspire devotion, it is a vain imagination. It presents “Christ” in such a way as not to inspire adoration.
4) If the picture is intended to picture only the human nature of Jesus, then it partakes of the Nestorian heresy that divides the hypostatic union, seeking to separate what is forever and unchangeably united
2Cor.5:16 is an important text to this discussion. “Even though we once regarded Christ according to the flesh, we regard him thus no longer.” Regarding Christ solely according to the flesh is an essentially humanistic apprehension of Christ. But he was not so, and is not so. He is not to be regarded in any kind of divided sense, but as the theanthropos, the God-man; and any reduction or division of our apprehension of him is a step backward. This is the sense in which his glory is robbed.