Theophylact of Ohrid — as excerpted in the Catena Aurea on Luke 22:7-13

“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.”