Luke 22:10

(in Matt. 26:18.) But I think that the man who meets the disciples as they enter into the city, carrying a pitcher of water, was some servant of a master of a house, carrying water in an earthen vessel either for washing or for drinking. And this I think is Moses conveying the spiritual doctrine in fleshly histories. But they who follow him not, do not celebrate the Passover with Jesus.

First observe the greatness of His divine power. He is talking with His disciples, yet knows what will happen in another place. Next behold His condescension, in that He chooses not the person of the rich or powerful, but seeks after the poor, and prefers a mean inn to the spacious palaces of nobles. Now the Lord was not ignorant of the name of the man whose mystery He knew, and that he would meet the disciples, but he is mentioned without a name, that he may be counted as ignoble. Or the pitcher is a more perfect measure, but the water is that which was thought meet to be a sacrament of Christ; to wash, not to be washed.

(Hom. 81. in Matt.) But as they knew not to whom they were sent, He gave them a sign, as Samuel to Saul, as it follows, And he said unto them, Behold, when ye are entered into the city, there shall a man meet you bearing a pitcher of water; follow him into the house where he entereth in. (1 Sam. 10:3.)

They prepare the Passover in that house, whither the pitcher of water is carried, for the time is at hand in which to the keepers of the true Passover, the typical blood is taken away from the lintel, and the baptism of the lifegiving fountain is consecrated to take away sin.

Now on the same fifth day He sends two of His disciples to prepare the Passover, namely, Peter and John, the one in truth as loving, the other as loved. In all things showing, that even to the end of His life He opposed not the law. And He sends them to a strange house; for He and His disciples had no house, else would He have kept the Passover in one of them. So it is added, And they said, Where will thou that we prepare? He sends them for this reason to an unknown man: to show them that He voluntarily underwent His Passion, since He who so swayed the mind of one unknown to Him, that He should receive them, was able to deal with the Jews just as He wished. But some say that He gave not the name of the man, lest the traitor knowing his name might open the house to the Pharisees, and they should have come and taken Him before that the supper was eaten, and He had delivered the spiritual mysteries to His disciples. But He directs them by particular signs to a certain house; whence it follows, And ye shall say to the goodman of the house, The Master saith, Where is the guestchamber, &c. And he will show you an upper room, &c. By the day of unleavened bread, we must understand that conversation which is wholly in the light of the Spirit, having lost all trace of the old corruption of Adam's first transgression. And living in this conversation, it becomes us to rejoice in the mysteries of Christ. Now these mysteries Peter and John prepare, that is, action and contemplation, fervid zeal and peaceful meekness. And these preparers a certain man meets, because in what we have just mentioned, lies the condition of man who was created after the image of God. And he carries a pitcher of water, which signifies the grace of the Holy Spirit. But the pitcher is humbleness of heart; for He giveth grace to the humble, who know themselves to be but earth and dust.