One is good, God. And hereby He gave us to understand that He Himself, in His human nature, did not attain to the height of Divine goodness. I do always the things that please Him. And this is the subjection to the Father, of obedience unto death. The relation of subservience and dominion is based upon action and passion, inasmuch as it belongs to a servant to be moved by the will of his master.
Nevertheless action is attributed to the nature as to that whereby the person or hypostasis acts.
Hence, although the nature is not properly said to rule or serve, yet every hypostasis or person may be properly said to be ruling or serving in this or that nature. And in this way nothing prevents Christ being subject or servant to the Father in human nature. It is foolish, or rather impious, to think or say this. Now Christ is said to be the servant of the Father inasmuch as He is subject to Him. Hence Christ is not subject to Himself.