Washing the Feet of the Disciples

Jesus has ended his public ministry and now turns his attention to his disciples. How can he possibly prepare them for what is to come? What final lessons in word and in deed does he give them? In the greatest act of humility next to the cross itself, Jesus washes the feet of the disciples, even Judas himself. How do the Fathers of the Church explain this? The mood is ominous as "the hour" has nearly arrived.