Greetings in that Divine and Most Precious Name of Our Lord and Savior Jesus Christ!
where Maximus seems to be following Severus of Antioch (entirely
unwittingly, one imagines, given his habitual denunciation of the
Monophysite patriarch): ‘if then with unmoistened feet, which have
bodily bulk and the weight of matter, he traversed the wet and unstable
substance, walking on the sea as on a pavement, he shows through
this crossing that the natural energy of his own flesh is inseparable
from the power of his divinity’ (1049BC: and see my note ad loc.)."
Simply beautiful! I was just discussing this exact issue in a Christological lesson with my Sunday School class this past Sunday. We were talking about the depth and faculties of the Tewahedo Union of the Incarnation according to Cyrillian Miaphysitism. A question was asked in just this manner, about the seemingly human and divine activities of Christ, and one of my students suggested (and even used the same phrasing as Pope Leo's Tome) that some actions are the Divine and others are Human, however we as a class came to Oriental conclusion that example was inaccurate, and instead followed the Oriental understanding that through the Union, the Divine exists interdependently through the Humanity because according to the Hypostatic Union, the Human Body is forever and inseparably the hypostatic Body and Person of the Divine Word, and so the Divine both exists and functions through the Humanity. So when Jesus Christ performs Divine acts such as miracles, it is not the Divine performing one action and the humanity performing another, because this implies a separation, which we in the Ethiopian tradition entirely reject.
In the story of walking on water, clearly it is not a purely Divine action, because the Divine Word of God has no feet with which to walk because the Divine naturally lacks all physicality. So if we see the Word performing any kind of physical activity, including physically walking on water, then we know it is a Divine-Human action because the human gives physical form to the Divine through the hypostatic Union.
Jesus Christ walks on water in His human body, and yet can only achieve this clearly supernatural act because of the inherent power of His Divinity, and thus the walking on water is one of the most perfect examples of the fullness of the Union and the absolute lack of separation.
Severian, can you repost the link to the website you sent me before full of Saint Severus writings? I would like to use them for my classes..