Mark 10:38

This he calls a baptism, showing that from it the whole world would receive a great purification. Then they say to him: "We can." In the fervor of their spirit they promise immediately, not knowing what they said, but looking to obtain that which they were asking.… He foretold great things for them; that is, you shall be held worthy of martyrdom, you shall suffer the things I have suffered, you shall end your life with a death from violence, and in this also you shall be sharers with me.

Do you see? They did not understand what they were asking for when they were talking to him about crowns and rewards and the privilege of the first seats and honors even before the contest had begun. Christ was communicating with them on two levels when he said: "You do not know what you are asking for." One was that they were talking about an earthly kingdom and he had said nothing about this. There had been no announcement or promise about a visible kingdom on earth. The other was that, when they sought at this time the privilege of the first seats and the honors of heaven, when they wished to be seen as more illustrious and splendid than the others, they were not asking for these things at the right time. The timing was precisely wrong. For this was not the right time for crowns or prizes. It was the time for struggles, contests, toils, sweat, wrestling rings and battles.

In Baptism are fulfilled the pledges of our covenant with God; burial and death, resurrection and life; and these take place all at once. For when we immerse our heads in the water, the old man is buried as in a tomb below, and wholly sunk forever; then as we raise them again, the new man rises in its stead. As it is easy for us to dip and to lift our heads again, so it is easy for God to bury the old man, and to show forth the new. And this is done thrice, that you may learn that the power of the Father, the Son, and the Holy Ghost fulfilleth all this. To show that what we say is no conjecture, hear Paul saying, "We are buried with Him by Baptism into death": and again, "Our old man is crucified with Him": and again, "We have been planted together in the likeness of His death." And not only is Baptism called a "cross," but the "cross" is called "Baptism." "With the Baptism," saith Christ, "that I am baptized withal shall ye be baptized": and, "I have a Baptism to be baptized with" (which ye know not); for as we easily dip and lift our heads again, so He also easily died and rose again when He willed, or rather much more easily, though He tarried the three days for the dispensation of a certain mystery.

Here Christ was calling his crucifixion a cup and his death a baptism. He called his cross a cup because he was coming to it with pleasure. He called his death a baptism because by it he cleansed the world. Not only on this account did he call his death a baptism but also because of the ease with which he would rise again. For just as one who is baptized in water easily rises up because the nature of the water poses no hindrance, so, too, Christ rose with greater ease because he had gone down into death. And this is why he calls his death a baptism.

It will not be as ye think, that I am to reign as a temporal king in Jerusalem, but all these things, that is, these which belong to My kingdom, are beyond your understanding; for to sit on My right hand is so great a thing that it surpasses the Angelic orders. But by the cup and baptism, He means the cross; the cup, that is, as being a potion by Him sweetly received, but baptism as the cause of the cleansing of our sins.

There follows: "You are my friends." O how great is the mercy of our Creator! We are not worthy to be servants, and we are called friends. How great is the dignity of men to be friends of God! But you have heard the glory of this dignity; hear also the labor of the struggle: "If you do what I command you." "You are my friends, if you do what I command you." As if He were saying openly: You rejoice at the height; consider by what labors one arrives at the height. Surely when the sons of Zebedee, through the intervention of their mother, sought that one should sit at the right hand of God and the other at the left, they heard: "Can you drink the cup that I am about to drink?" They were already seeking the place of exaltation; the Truth calls them back to the way by which they might come to exaltation. As if it were said: The place of exaltation already delights you, but first let the way of labor exercise you. Through the cup one reaches majesty. If your mind desires what pleases, first drink what causes pain. Thus, thus through the bitter cup of affliction one arrives at the joy of salvation.

Therefore the Lord also rebukes them as not understanding what they are asking: "You do not know," He says, "what you are asking." You think that My Kingdom will be an earthly one, and therefore you ask for an earthly seat; no, it is not …

(ubi sup.) Or else, they know not what they ask, who seek from the Lord a seat of glory, which they do not yet merit.

You know not what you ask. Can you drink of the cup that I drink of, or be baptized with the baptism wherewith I am baptized? And they said to him: We can. They know not what they ask, who seek from the Lord the …

But Jesus said unto them,....

Let us mark in this passage, the ignorance of our Lord's disciples . We find James and John petitioning for the first places in the kingdom of glory. We find them confidently declaring their ability to drink of their Master's cup and be baptized with their Master's baptism. In spite of all the plain warnings of our Lord, they clung obstinately to the belief that Christ's kingdom on earth was immediately going to appear. Notwithstanding their many shortcomings in Christ's service, they had no misgivings as to their power to endure any thing which might come upon them.

Here it is the cup of suffering. and be baptized with the baptism that I am baptized with?--(Compare for the language, Ps 42:7). The object of this question seems to have been to try how far those two men were capable of the dignity to which they aspired and this on the principle that he who is able to suffer most for His sake will be the nearest to Him in His kingdom.

Let us mark in this passage, the ignorance of our Lord's disciples . We find James and John petitioning for the first places in the kingdom of glory. We find them confidently declaring their ability to drink of their Master's cup and be baptized with their Master's baptism. In spite of all the plain warnings of our Lord, they clung obstinately to the belief that Christ's kingdom on earth was immediately going to appear. Notwithstanding their many shortcomings in Christ's service, they had no misgivings as to their power to endure any thing which might come upon them. With all their faith, and grace, and love to Jesus, they neither knew their own hearts, nor the nature of the path before them. They still dreamed of temporal crowns, and earthly rewards. They still knew not what manner of men they were. There are few true Christians who do not resemble James and John, when they first begin the service of Christ. We are apt to expect far more present enjoyment from our religion, than the Gospel warrants us to expect. We are apt to forget the cross, and the tribulation, and to think only of the crown. We form an incorrect estimate of our own fortitude and power of endurance. We misjudge our own ability to stand temptation and trial. And the result of all is that we often buy wisdom dearly, by bitter experience, after many disappointments, and not a few falls. Let the case before us teach us the importance of a solid and calm judgment in our religion. Like James and John, we are right in coveting the best gifts, and in telling all our desires to Christ. Like them we are right in believing that Jesus is King of kings, and will one day reign upon the earth. But let us not, like them, forget that there is a cross to be borne by every Christian, and that "through much tribulation we must enter into the kingdom of God." (Acts 14:22.)