Do you see how great power was in the coming of the prophet? How he stirred up all the people; how he led them to a consideration of their own sins? For it was indeed worthy of wonder to behold him in human form showing forth such things and using so great freedom of speech, and rising up in condemnation of all as children, and having his great grace beaming out from his countenance. And, moreover, the appearance of a prophet after the great interval of time contributed to their amazement, because the gift had failed them, and returned to them after a long time.
And the nature of his preaching too was strange and unusual. For they heard of none of those things to which they were accustomed; such as wars and battles and victories below, and famine and pestilence, and Babylonians and Persians, and the taking of the city, and the other things with which they were familiar, but of Heaven and of the kingdom there, and of the punishment in hell. And it was for this cause, let me add, that although they that committed revolt in the wilderness, those in the company of Judas, and of Theudas, had been all of them slain no great while before, yet they were not the more backward to go out there.
For neither was it for the same objects that he summoned them, as for dominion, or revolt, or revolution; but in order to lead them by the hand to the kingdom on high. Wherefore neither did he keep them in the wilderness to take them about with him, but baptizing them, and teaching them the rules concerning self-denial, he dismissed them; by all means instructing them to scorn whatever things are on earth, and to raise themselves up to the things to come, and press on every day.
Source: Homilies on the Gospel of St. Matthew (New Advent)