Matthew 4:23

An example of life for doctors; that they should not be inactive, they are instructed in these words, And Jesus went about. That they should not be acceptors of persons the preachers are instructed in what follows, the whole of Galilee. That they should not go about empty, by the word teaching. That they should seek to benefit not few but many, in what follows, in their synagogues. That they should not preach error nor fable, but sound doctrine, is inculcated in the words, preaching the Gospel of the kingdom. 'Teaching' and 'preaching' differ; teaching refers to things present, preaching to things to come; He taught present commandments and preached future promises. That the teacher should study to commend his teaching by his own virtuous conduct is conveyed in those words, healing every sort of disease and malady among the people; maladies of the body, diseases of the soul.

Isaiah predicted this would happen when he said, "He himself took our infirmities and bore our sickness." To this end the teacher of life and heavenly physician Christ the Lord had come that by his direction he might educate people to life and with his heavenly medicine cure the sickness of body and soul, that he might free bodies beset by the devil and restore those persons afflicted by various infirmities to true and complete health. By the word of divine power he cured the weaknesses of the body, but by the medicine of heavenly teaching he healed the wounds of the soul. David clearly noted that the wounds of the soul are healed by God alone when he said, "Bless the Lord, O my soul, and forget not all his benefits," to which he added, "who forgives all your iniquity, who heals all your diseases." He is the true and perfect physician therefore who gives healing to the body and restores the soul to health: our Lord and Savior.

When therefore He had caught them, then He begins in their presence to work miracles, by His deeds confirming the words of John concerning Him. And He was continually frequenting their synagogues, even by this instructing them that He was not a sort of adversary of God and deceiver, but that He was come in accordance with the Father. And while frequenting them, He did not preach only, but also showed forth miracles. And this, because on every occasion, whensoever anything is done strange and surprising, and any polity is introduced, God is wont to work miracles as pledges of His power, which He affords to them that are to receive His laws. Thus, for instance, when He was about to make man, He created a whole world, and then gave him that law which he had in Paradise. And when He was to give laws to Noah, He showed forth anew great miracles, in that He reduced again the whole creation to its elements, that fearful sea to prevail for a full year; and in that, amid so great a tempest, He preserved that righteous man. And in the time of Abraham too He vouchsafed many signs; as his victory in the war, the plague upon Pharaoh, his deliverance from dangers. And when about to legislate for the Jews, He showed forth those marvellous and great prodigies, and then gave the law. Just so in this case also, being to introduce a certain high polity, and to tell them what they had never heard, by the display of the miracles He confirms what He saith. Thus because the kingdom He was preaching appeared not, by the things that appear, He makes it, though invisible, manifest.