All this was done, that it might be fulfilled which was spoken by the prophet, saying,
All Commentaries on Matthew 21:4 Go To Matthew 21
John Chrysostom
AD 407
And besides what we have said, He was fulfilling also another prophecy, one which was twofold, one part in words, and another in deeds. And that in deeds was, by the sitting on the ass; and that by words, the prediction of Zacharias; because he had said, that the King should sit on an ass. And He, having sat and having fulfilled it, gave to the prophecy another beginning again, by what He was doing typifying beforehand the things to come.
How and in what manner? He proclaimed beforehand the calling of the unclean Gentiles, and that He should rest upon them, and that they should yield to Him and follow Him, and prophecy succeeded to prophecy.
But to me He seems not for this object only to sit on the ass, but also as affording us a standard of self-denial. For not only did He fulfill prophecies, nor did He only plant the doctrines of the truth, but by these very things He was correcting our practice for us, everywhere setting us rules of necessary use, and by all means amending our life.
For this cause, I say, even when He was to be born He sought not a splendid house, nor a mother rich and distinguished, but a poor woman, and one that had a carpenter as her betrothed husband; and is born in a shed, and laid in a manger: and choosing His disciples, He chose not orators and wise men, not rich men and nobly born, but poor men, and of poor families, and in every way undistinguished; and providing His table, at one time He sets before Himself barley loaves, and at another at the very moment commands the disciples to buy at the market. And making His couch, He makes it of grass, and putting on raiment, He clothes Himself in what is cheap, and in no respect different from the common sort; and a house He did not so much as possess. And if He had to go from place to place, He did this travelling on foot, and so travelling, as even to grow weary. And sitting, He requires no throne nor pillow, but sits on the ground, sometimes in the mountain, and sometimes by the well, and not merely by the well, but also alone, and talks with a Samaritan woman.
Again, setting measures of sorrow, when He had need to mourn, He weeps moderately, everywhere setting us rules, as I have said, and limits how far one ought to proceed, and not any further. So for this intent now also, since it happens that some are weak and have need of beasts to carry them, in this too He fixes a measure, showing that one ought not to yoke horses or mules to be borne by them, but to use an ass, and not to proceed further, and everywhere to be limited by the want.