"What you are going to do, do quickly"

This essay critiques a popular homiletic claim that Jesus only realized he was the "Lamb of God" when Judas failed to return with a paschal lamb during the Last Supper. Through a close narrative-critical reading of John's Gospel, tracing the characterization of Judas and Satan from the Bread of Life discourse through the foot-washing scene and the Betrayal Announcement Narrative (13:21-32), the author argues that the Johannine Jesus possesses full foreknowledge and consent regarding his betrayal and his identity as the Lamb of God from much earlier in the Gospel, not as a late realization. Jesus' command to Judas, "what you are going to do, do quickly," is read as an imploration rather than an order to buy a lamb. The essay closes with reflections on how this reading enriches liturgical participation in the Agnus Dei and fractio rite.