Holy Thursday inaugurates the Triduum, the three days of ceaseless prayer in which the Church commemorates the Lord’s passion, death and resurrection. But, in a sense, the Holy Thursday liturgy frames the Triduum. Holy Thursday sets the stage for the passion, but it also points beyond Easter, and in both instances it does so by focusing on the Incarnation of Jesus Christ.
The Holy Thursday Mass recalls the Lord’s Jewishness. This is a Passover seder that he was celebrating with his disciples, recalling the deliverance of Israel from slavery in Egypt. Now, Jesus brings deliverance from the slavery of sin, and not just to Israel but to the whole world, and he does so by starting in the most human way possible, a celebratory dinner with friends. He calls attention to his humanity so that the full salvific effects of what is to come will be made clear: The Christ is here to save human kind and he can do so because he is himself human.