Matthew 21:4

For the Prophet knowing the malice of the Jews, that they would speak against Christ when He went up to the Temple, gave them this sign beforehand, whereby they might know their King, Say ye to the daughter of Sion.

(ap. Anselm) Hereto is added the testimony of the Prophet, that it may be shown that the Lord fulfilled all things which were written of Him, but that the Scribes and Pharisees, blinded by envy, would not understand the things that they read; All this was done, that it might be fulfilled which was spoken by the Prophet; (Zech. 9:9.) to wit, Zacharias.

And yet He had often entered Jerusalem before, but never with so much circumstance. What then is the cause? It was the beginning then of the dispensation; and neither was He very well known, nor the time of His passion near; wherefore He mixed with them with less distinction, and more disguising Himself. For He would not have been held in admiration, had He so appeared, and He would have excited them to greater anger. But when He had both given them sufficient proof of His power, and the cross was at the doors, He makes Himself then more conspicuous, and doeth with greater circumstance all the things that were likely to inflame them. For it was indeed possible for this to have been done at the beginning also; but it was not profitable nor expedient it should be so. But do thou observe, I pray thee, how many miracles are done, and how many prophecies are fulfilled. He said, "Ye shall find an ass;" He foretold that no man should hinder them, but that all, when they heard, should hold their peace. But this is no small condemnation of the Jews, if them that were never known to Him, neither had appeared before Him, He persuades to give up their own property, and to say nothing against it, and that by His disciples, while these, being present with Him at the working of His miracles, were not persuaded.

And do not account what was done to be a small thing. For who persuaded them, when their own property was taken from them, and that, when they were perhaps poor men and husbandmen, not to forbid it? Why say I not to forbid it? not to ask, or even if they asked, to hold their peace, and give it up. For indeed both things were alike marvellous, as well, if they said nothing, when their beasts were dragged away, or if having spoken, and heard, "The Lord hath need of them," they yielded and withstood not, and this when they see not Him, but His disciples. By these things He teaches them, that it was in His power to have entirely hindered the Jews also, even against their will, when they were proceeding to attack Him, and to have made them speechless, but He would not. And another thing again together with these doth He teach the disciples, to give whatever He should ask; and, though he should require them to yield up their very life, to give even this, and not to gainsay. For if even strangers gave up to Him, much more ought they to strip themselves of all things. 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 seemeth 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.

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. But let us look also at the prophecy, that by words, that by acts. What then is the prophecy? "Behold, thy King cometh to thee, meek, and riding on an ass, and a young colt;" not driving chariots, like the rest of the kings, not demanding tributes, not thrusting men off, and leading about guards, but displaying His great meekness even hereby. Ask then the Jew, what King came to Jerusalem borne on an ass? Nay, he could not mention, but this alone.