يوحنا ١٧:١٩

And for their sakes I sanctify--consecrate. myself that they also might--may. be sanctified--consecrated. The only difference between the application of the same term to Christ and the disciples is, as applied to Christ, that it means only to "consecrate"; whereas, in application to the disciples, it means to consecrate with the additional idea of previous sanctification, since nothing but what is holy can be presented as an offering. The whole self-sacrificing work of the disciples appears here as a mere result of the offering of Christ [OLSHAUSEN]. through--in. the truth--Though the article is wanting in the original here, we are not to translate, as in the Margin, "truly sanctified"; for the reference seems plainly to be "the truth" mentioned in Joh 17:17. (See on Joh 17:17).

This chapter is a prayer, it is the Lord's prayer, the Lord Christ's prayer. There was one Lord's prayer which he taught us to pray, and did not pray himself, for he needed not to pray for the forgiveness of sin; but this was properly and peculiarly his, and suited him only as a Mediator, and is a sample of his intercession, and yet is of use to us both for instruction and encouragement in prayer. Observe, I. The circumstances of the prayer (Joh 17:1). II. The prayer itself. 1. He prays for himself (Joh 17:1-5). 2. He prays for those that are his. And in this see, (1.) The general pleas with which he introduces his petitions for them (Joh 17:6-10). (2.) The particular petitions he puts up for them [1.] That they might be kept (Joh 17:11-16). [2.] That they might be sanctified (Joh 17:17-19). [3.] That they might be united (Joh 17:11 and Joh 17:20-23). [4.] That they might be glorified (Joh 17:24-26).

17:19 I give myself as a holy sacrifice (literally I sanctify myself): Priests and prophets were similarly set apart for service to God (Lev 8:30; Jer 1:5). Jesus recommitted himself to his mission, acknowledging that he was set apart for the purpose of the cross. The disciples would benefit because his death would enable them to experience new holiness in a deep attachment to God.