"Christ, then, energises according to both His natures and either nature energises in Him in communion with the other, the Word performing through tile authority and power of its divinity all the actions proper to the Word, i.e. all acts of supremacy and sovereignty, and the body performing all the actions proper to the body, in obedience to the will of the Word that is united to it, and of whom it has become a distinct part. For He was not moved of Himself to the natural passions, nor again did He in that way recoil from the things of pain, and pray for release from them, or suffer what befel from without, but He was moved in conformity with His nature, the Word willing and allowing Him oeconomically to suffer that, and to do the things proper to Him, that the truth might be confirmed by the works of nature."
"Note, therefore, that in the case of our Lord Jesus Christ, we speak sometimes of His two natures and sometimes of His one person: anti the one or the other is referred to one conception. For the two natures are one Christ, and the one Christ is two natures. Wherefore it is all the same whether we say "Christ energises according to either of His natures," or "either nature energises in Christ in communion with the other." The divine nature, then, has communion with the flesh in its energising, because it is by the good pleasure of the divine will that the flesh is permitted to suffer and do the things proper to itself, and because the energy of the flesh is altogether saving, and this is an attribute not of human but of divine energy. On the other hand the flesh has communion with the divinity of the Word in its energising, because the divine energies are performed, so to speak, through the organ of the body, and because He Who energises at once as God and man is one and the same."
- St. John Damascene