"And during supper, when the devil had already put it into the heart of Judas Iscariot, Simon's son, to betray him, Jesus, knowing that the Father had given all things into his hands, and that he had come from God and was going to God, rose from supper, laid aside his garments, and girded himself with a towel. Then he poured water into a basin, and began to wash the disciples' feet, and to wipe them with the towel with which he was girded."
What utter humility for Jesus, Who knows that He is God, to willingly wash his disciples' disgusting feet. What incredible love for Him to extend this beautiful offer of cleansing to those He knew would soon betray and deny Him. It's the same amazing offer of grace that He constantly extends to us. If we believe this, what else can we do than respond with love and gratitude?