We're confronted with 2 theological & life-changing realities:
#1 - God's Sovereignty (v.17-19)
a) Timing: Jesus can't be betrayed before the Passover (v.18)
b) Teaching: Jesus must show the deep meaning of the Passover (v.18)
#2 - Human Responsibility (v.19-28)
a) The way of submission: True disciples (v.21-22)
b) The way of self: Judas (v.25)