John 13:20

Verily, verily, I say unto you, He that receiveth whomsoever I send receiveth Me; and he that receiveth Me receiveth Him that sent Me.

All the words of kindly admonition, all the promises of future blessings, were directed only to the true disciples, only to those whose faith was firmly grounded in Jesus, their Master and Savior. And the Lord here expressly makes an exception in the case of one man. He knew very well whom He had chosen; He was altogether aware of the significance of His every action. But in their very midst was one in whom the words of the prophet would be fulfilled: He that eats with Me bread has lifted up against Me his heel, Psalms 41:9. It would be a man that had been in the utmost intimacy with the Savior, one that had been accepted into the inner circle of the apostles and intimates of the Lord, that would become guilty of the most fiendish and devilish crime that could be imagined, namely, of spurning the Lord that bought him with His holy blood. But herein would the Scripture be fulfilled. In that very fact, in the heinous crime of one member of the table-round, they would find confirmation of the fact that nothing was hidden from their Master. Thus they would be induced and encouraged to believe and trust in Him all the more firmly. That should strengthen them in their belief that Jesus was truly the Messiah that had been promised to the world. And so far as the true disciples were concerned, they should be perfectly assured in regard to their apostleship. He tells them that His messengers must be received with the deference and honor due Him, and that in a similar way those that receive Him and believe on Him thereby receive the Father. Every service rendered to any true servant of the Gospel is entered into the accounts of God as one rendered to Himself, and will receive its reward of mercy accordingly, on the last day. See Matthew 10:40; Luke 10:16. There is an encouraging admonition here for the Christians of all times.