The Apostle John, however, clarifies that this promise was constrained, not being mentioned in his account but acknowledged in the statements made to the Lord before verses 17-18. He emphasized that only those preordained by God for salvation would benefit from such promises, and that the Scriptures would manifest through one of them, despite his selection as a disciple of the Lord. The treachery of Judas, along with its repercussions, would create challenges for the true followers of Christ. Nevertheless, they were reminded that this had already been predicted, and was thus foreseen by the Lord.
To bolster their faith, the Lord contrasted Judas' betrayal by foretelling that they would serve as ambassadors in His name. He exalted the significance of their mission, declaring that to welcome them is akin to welcoming Christ Himself, as well as God. According to Luke, they are blessed not only for their knowledge of these truths but for their commitment to act upon them. All the while, one among them, who is unwilling even to wash the feet of his fellow disciples, would soon betray the very Teacher and Lord he professes to follow.