I speak not of you all: I know whom I have chosen: but that the scripture may be fulfilled, He that eateth bread with Me hath lifted up his heel against Me.
Now I tell you before it come, that, when it is come to pass, ye may believe that I am He.
Jesus is preparing the disciples for what is to come, beginning with the fact that one of them will betray Him. He says, “I know whom I have chosen.”
This is not so much that Jesus knew ahead of time, but that He knew the character of the one who would betray Him. He knew Judas’ greed, his hypocrisy; and he knew that Judas had already agreed with the Pharisees to betray Him for 30 pieces of silver–the price of a slave. Yet He still chose to break bread with Judas as one of the twelve, a close friend. I wonder what Judas was thinking at that moment.
Psalm 41:9, a Messianic Psalm, says, “Yea, Mine own familiar friend, in whom I trusted, which did eat of My bread, hath lifted up his heel against Me.”
To partake of someone’s hospitality and then betray that person was considered an unforgivable breach of trust and friendship. I actually had this happen to me once, many years ago, when a person who had eaten at our table went on to tell people unkind things about me. It’s hurtful. But it was a small thing compared to what Judas did. He knew he was betraying Jesus unto death of the worst kind.
Jesus went on to tell the disciples that He told them what would happen before it happened, to strengthen their belief in Who He was.