Sanctify them through your truth: your word is truth.
All Commentaries on John 17:17 Go To John 17
Cornelius a Lapide
AD 1637
Sanctify them through Thy truth. This signifies not the beginning of sanctification, but its progress and perfection (Rev. xxi.) Confirm and perfect them in holiness; pour into them by the Holy Spirit at Pentecost complete evangelical truth, that they may be filled with wisdom and holiness, both within and without, and thus become in life and doctrine true teachers of the world, Priests and Rulers of the churches, breathing on all their own holiness, as a fire from above.
Thy word is truth. (1.) It is not Moses or Philosophers, but Thy word which teaches this evangelical truth. The holiness of Moses and the Jews was merely ceremonial and shadowy. That of Philosophers was either pretended, or else merely moral and natural. That of Christ was supernatural, heavenly, and divine. Others understand by the words, sanctify them truly, that is completely and perfectly, as the Apostle says ( Ephesians 4:24.), in true holiness (the holiness of truth, Vulg.). For perfect and great holiness is required in an Apostle, for continuous preaching, for resisting tyrants, for labouring night and day, for suffering martyrdom and death ( 2 Corinthians 11). 2d. It can be explained thus: "Sanctify them in Me, who am the way, the truth, and the life. Make them partakers of My goodness and holiness." So S. Augustine (in loc.), S.Cyril, Rupertus, and S. Thomas.
3d. Maldonatus explains it: Set them apart as holy ministers and preachers of the Gospel. But in truth, not in shadow, as of old Aaron and his sons were consecrated only in a shadowy and typical way. So S. Chrysostom. And Jeremiah ( Jeremiah 1:5) was said to have been sanctified in the womb, that is designated and, as it were, consecrated as a Prophet.
4th. It might be thus understood: "Make them holy victims, that they may be sanctified and offered to Thee in martyrdom." It was fitting that the Apostles should become martyrs, in order to confirm and seal the holiness of their doctrine by the holiness of their martyrdom. And thence, in fact, all the Apostles were martyrs, after the pattern of Christ, who said (ver19), "I sanctify Myself," i.e, I offer Myself. For in Leviticus the victims are always said to be sanctified, when they are offered to God. See below, ver19. Observe, Christ as man had a threefold sanctity, which He imparted to the Apostles and the faithful. (1.) The first was infused into the soul of Christ at the very instant of His conception, just as God bestows all power on us by virtue of His merits. (2.) The second was Divine sanctity, by which the Deity is Itself most holy, and the fount of all holiness in men and angels. For Christ had this as man by communicatio idiomatum, by which the attributes of Godhead are truly ascribed to the man Christ, as subsisting with the Godhead in the one Person of the Word. (3.) The holiness of Christ as Prayer of Manasseh , was absolutely caused by this hypostatical union with the Word, for by this the manhood of Christ was absolutely sanctified and made most holy. For even if Christ as man had had no infused grace, yet His very hypostatical union with the Word was His highest sanctification and holiness. Whence the manhood of Christ, as being united to the Word, was clearly impeccable, most pleasing and acceptable to God. Nay more, Christ, as Prayer of Manasseh , was the Son of God, not by adoption, as we are, but properly, and in His very nature.
Thy word is truth. The gospel which I preach, as I received it of Thee, is not shadowy, as was the old Law, but is in spirit and in truth. See notes on chap. xv3. For "the Law was given by Moses, but grace and truth were wrought by Jesus Christ" ( John 1:17).
Morally. Learn here how holy a Christian ought to be, especially a "Religious" and Apostolic Prayer of Manasseh , who wishes to make others holy, so as to be like the Apostles, and even like Christ, and to be diligent in imitating their most holy practices and deeds. "Christianity," says S. Gregory Nyssen, "is the imitation of the Divine Nature." For a Christian ought to imitate, as much as He can, the holiness of God in Christ, so that Christ may always shine forth in his words and actions, and that any one who sees or hears him, may think that he sees and hears Christ. Holiness is a turning away from the world, and a turning to God and Christ, and union with them. Accordingly the Apostles converted the world, more by their holiness and burning love than by their preaching. Nay, they thundered with their mouth, because they flashed forth in their life, as Nazianzen said of S. Basil. See my sketch of S. Paul, prefixed to the Acts of the Apostles.
