2 Yet none of these things made them take courage, and this when they were continually hearing about His resurrection. For together with His death this also especially troubled them, to hear that men should “mock and scourge Him,” and the like. For when they considered His miracles, the possessed persons whom He had delivered, the dead whom He had raised, all the other marvellous works which He was doing, and then heard these things, they were amazed, if He who does these works is thus to suffer. Therefore they fell even into perplexity, and now believed, now disbelieved, and could not understand His sayings. So far at least were they from understanding clearly what He said, that the sons of Zebedee at the same time came to Him, and spoke to Him of precedence. “We desire,” it is said, “that one should sit on Your right hand, and one on Your left.” How then does this evangelist say, that their mother came to Him? It is probable both things were done. I mean, that they took their mother with them, with the purpose of making their entreaty stronger, and in this way to prevail with Christ.
For in proof that this is true, as I say, and the request was rather theirs, and that being ashamed they put forward their mother, mark how Christ directs His words to them.
But rather let us learn, first, what do they ask, and with what disposition, and whence they were moved to this? Whence then were they moved to this? They saw themselves honored above the rest, and expected from that they should obtain this request also. But what can it be they ask? Hear another evangelist plainly declaring this. For, “Because He was near,” it is said, “to Jerusalem, and because they thought the kingdom of God should immediately appear,” they asked these things. For they supposed that this was at the doors, and visible, and that having obtained what they asked, they would undergo none of the painful things. For neither for its own sake only did they seek it, but as though they would also escape the hardships.
Wherefore also Christ in the first place leads them off from these thoughts, commanding them to await slaughter and dangers, and the utmost terrors. For, “Are ye able,” says He, “to drink of the cup that I drink of?”
But let no man be troubled at the apostles being in such an imperfect state. For not yet was the cross accomplished, not yet the grace of the Spirit given. But if you would learn their virtue, notice them after these things, and you will see them superior to every passion. For with this object He reveals their deficiencies, that after these things you might know what manner of men they became by grace.
That then they were asking, in fact, for nothing spiritual, neither had a thought of the kingdom above, is manifest from hence. But let us see also, how they come unto Him, and what they say. “We would,” it is said, “that whatsoever we shall desire of You, You should do it for us.”
And Christ says to them, “What would ye?” not being ignorant, but that He may compel them to answer, and lay open the wound, and so apply the medicine. But they out of shame and confusion of face, because under the influence of a human passion they had come to do this, took Him privately apart from the disciples, and asked Him. For they went before, it is said, so that it might not be observable to them, and so said what they wished. For it was their desire, as I suppose, because they heard, “You shall sit on twelve thrones,” to have the first place of these seats. And that they had an advantage over the others, they knew, but they were afraid of Peter, and say, “Command, that one sit on Your right hand, one on Your left;” and they urge Him, saying, “Command.”
What then says He? Showing, that they asked nothing spiritual, neither, if they had known again what they were asking, would they have ventured to ask for so much, He says, “You know not what ye ask,” how great, how marvellous, how surpassing even the powers above. After that He adds, “Are ye able to drink of the cup that I shall drink of, and to be baptized with the baptism that I am baptized with?” Do you see, how He straightway drew them off from their suspicion, by framing His discourse from the contrary topics? For you, He says, talk to me of honor and crowns, but I to you of conflicts and labors. For this is not the season for rewards, neither shall that glory of mine appear now, but the present time is one of slaughter, and wars, and dangers.
And see how by the form of His question, He both urges and attracts them. For He said not, “Are ye able to be slain?” “Are ye able to pour forth your blood?” but how? “Are ye able to drink of the cup?” Then to attract them to it, He says, “Which I shall drink of,” that by their fellowship with Him in it they might be made more ready.
And a baptism again calls He it; showing that great was the cleansing the world was to have from the things that were being done.
“They say unto Him, We are able.” Out of their forwardness they straightway undertook it, not knowing even this which they were saying, but looking to hear what they had asked.
What then says He? “You shall drink indeed of my cup, and be baptized with the baptism that I am baptized with.” Great blessings did He foretell to them. His meaning is, you shall be counted worthy of martyrdom, and shall suffer these things which I suffer; you shall close your life by a violent death, and in these things you shall be partakers with me; “But to sit on my right hand and on my left is not mine to give, but it shall be given to them for whom it is prepared of my Father.”
Source: Homilies on the Gospel of St. Matthew (New Advent)