The Twelve and the Savior met in an upper room for the Passover, a sacred time. At that time, the Savior dismissed Judas, he who would betray him, saying "What thou doest, do quickly."
He washed the apostles feet, an ordinance still done by the apostles today, thus giving another example of service, stating to Peter that if he didn't allow him to wash his feet, he had no part of him, Christ. So for us, we must accept the service done by Christ to be saved.
He instituted the Sacrament, taking bread, braking it, and gave it to them, reminding them that it was his body, given for them. Then he gave them to drink, saying that the cup was his blood, which was shed for them. We take the sacrament each week. How well do we remember the Savior, and what he did for all of us?
He said to Love one another, as he had loved them. How well do each of us do that?
He said "Peace, I leave with you, my peace I give unto you, not as the world giveth, give I unto you.
He told the twelve what would happen soon, that he wouldn't be with them for very long. He said that in him they would be able to have peace.
He declared that the twelve would have tribulations, but that he had overcome the world. The twelve still didn't understand that he would be delivered to death, or that he would be resurrected, though the Savior had taught that to them.
Watch a video about this at https://www.youtube.com/watch?v=997ni1xcmKw
But the full import of what he would do would not come until later...
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