Sanctify them by the truth;The term "sanctify" means to set apart for a holy purpose. In the context of
John 17, Jesus is praying for His disciples, asking God to consecrate them for their mission in the world. This sanctification is not merely a moral cleansing but a dedication to God's service. The concept of sanctification is rooted in the Old Testament, where priests and objects were set apart for worship (
Exodus 29:1,
Leviticus 20:7-8). In the New Testament, sanctification is a process that involves the Holy Spirit (
1 Thessalonians 5:23) and is essential for believers to fulfill their calling (
1 Peter 1:2).
Your word is truth.
The "word" refers to the message of God, which is embodied in the Scriptures and ultimately in Jesus Christ Himself (John 1:1, 14). The assertion that God's word is truth emphasizes its reliability and authority. In a world filled with deception and falsehood, the truth of God's word stands as the ultimate standard. This aligns with Psalm 119:160, which declares, "The entirety of Your word is truth." The truth of God's word is not only doctrinal but also transformative, as it renews the mind and guides believers in righteousness (Romans 12:2, 2 Timothy 3:16-17).
Persons / Places / Events
1.
Jesus ChristThe speaker of this prayer, Jesus is addressing God the Father on behalf of His disciples. This prayer is part of what is known as the High Priestly Prayer.
2.
God the FatherThe recipient of Jesus' prayer, He is the one who sanctifies believers through His truth.
3.
The DisciplesThe immediate audience for whom Jesus is praying. They represent all believers who follow Christ.
4.
The Upper RoomThe location where Jesus delivered this prayer, during the Last Supper with His disciples.
5.
The High Priestly PrayerThis is the context of
John 17, where Jesus prays for Himself, His disciples, and all future believers.
Teaching Points
Sanctification through TruthSanctification is a process of being set apart for God's purposes. It involves growing in holiness and Christlikeness.
The truth of God's word is the primary means by which believers are sanctified. Regular engagement with Scripture is essential for spiritual growth.
The Authority of ScriptureJesus affirms the authority and reliability of God's word. Believers are called to trust and obey Scripture as the ultimate standard of truth.
Prayer for SanctificationJesus' prayer for His disciples includes a request for their sanctification. Believers should likewise pray for their own sanctification and that of others.
Living Out the TruthKnowing the truth is not enough; believers must live it out. This involves applying biblical principles in daily life and making decisions that reflect God's truth.
Community and AccountabilitySanctification is often facilitated within the context of Christian community. Believers should seek accountability and encouragement from fellow Christians.
Bible Study Questions and Answers
1. What is the meaning of John 17:17?
2. How does John 17:17 define the role of truth in sanctification?
3. What does "Your word is truth" imply about the Bible's authority?
4. How can we apply the truth of John 17:17 in daily life?
5. How does John 17:17 connect with Psalm 119:105 about God's word?
6. How can believers use John 17:17 to pursue personal holiness?
7. What does "Sanctify them by the truth; Your word is truth" mean in John 17:17?
8. How does John 17:17 define the concept of truth in Christianity?
9. Why is sanctification important according to John 17:17?
10. What are the top 10 Lessons from John 17?
11. What are the duties of a Christian life coach?
12. How can you purify your inner self?
13. Is all truth dependent on cultural context?
14. Does truth depend on consistency within a belief system?What Does John 17:17 Mean
Sanctify them“Sanctify” means to set apart for God’s special use. Here, Jesus is praying that His disciples would be devoted wholly to God’s purposes—morally pure, spiritually distinct, and useful to His mission.
• In John 15:19, Jesus already said, “You are not of the world, but I chose you out of the world.” Now He asks the Father to deepen that distinction.
• 1 Thessalonians 5:23 echoes the same desire: “May the God of peace Himself sanctify you completely.”
• Leviticus 20:7–8 shows God’s consistent heart: “Consecrate yourselves… and keep My statutes, for I am the LORD who sanctifies you.”
Jesus’ request assures us that sanctification is God’s work, not merely self-effort. He is the One who separates, cleanses, and prepares us for holy living.
by the truthThe instrument God uses is “the truth.” Truth is not abstract; it is the reality revealed by God.
• Psalm 119:9 ties purity to truth’s pathway: “How can a young man keep his way pure? By guarding it according to Your word.”
• Ephesians 4:21–24 shows how truth renews the mind and creates a new self “in true righteousness and holiness.”
• James 1:18 reminds us that God “chose to give us birth through the word of truth.”
Sanctification, then, happens as we continually encounter and submit to what God says is real, right, and unchanging.
Your word is truthJesus identifies the Father’s word as the very definition of truth. Scripture is not merely true; it is truth itself, the standard by which everything else is measured.
• Psalm 33:4 affirms, “The word of the LORD is upright, and all His work is trustworthy.”
• Proverbs 30:5 declares, “Every word of God is flawless.”
• 2 Timothy 3:16–17 shows the practical effect: all Scripture “is God-breathed… so that the man of God may be complete, fully equipped for every good work.”
By anchoring sanctification to God’s written word, Jesus assures us that holiness grows as we feed on Scripture, obey it, and let it reshape our thoughts, motives, and actions.
summaryJohn 17:17 reveals a simple, liberating pattern: God Himself sets His people apart, He does it through the objective reality of divine truth, and that truth is found in His infallible word. As we submit to Scripture, the Father answers Jesus’ prayer in us—shaping hearts, clarifying minds, and empowering lives that shine His holiness in a watching world.
(17)
Sanctify them through thy truth.--Better,
in Thy truth. Truth was the sphere in which their sanctification was to take place. They had through Christ received the Father's word, which was truth, and had passed into a new region of life, separate from the world (
John 17:6-8;
John 17:14-16). He has prayed that the Father would preserve them in this, and now He prays further that the Father would in this new region of life set them apart for the work to which He had sent them (
John 17:18).
The idea at the root of the word rendered "sanctify," is not holiness, but separation. It is opposed not to what is impure, but to what is common, and is constantly used in the Greek of the Old Testament for the consecration of persons and things to the service of God. Hence our Lord can use it of Himself in John 10:36, and in this context (John 17:19; these are the only places where it occurs in St. John's writings). He was Himself "set apart and sent into the world." He has to send them into the world in the same way (John 17:18, and John 10:36), and prays that they may be in the same way consecrated for their work. . . .
Verse 17. -
Sanctify them; consecrate them (cf.
John 10:36, of the sanctification of the Son by the Father to the work of effecting human redemption), separate them from the evil of the world, as for holy purposes. Devote them to the glorious cause. Let them be sacrifices on the altar. The
ἁγιάζω, to sanctify, is not synonymous with
καθαρίζω, to purify;
α{γιος ισ not a contradiction of the defiled so much as of the purely natural, and involves the higher ends of grace (
Exodus 29:1, 36;
Exodus 40:13). The sanctification of the Old Testament is a ritual process effected by ceremonial observance; the sanctification of the New Testament is a spiritual process passing over heart and conscience and will, and is the work of the Divine Spirit. Meyer, Westcott, and others translate the next clause,
in the truth, as the atmosphere in which the disciples dwell; but a large number of commentators, with Godet, take
ἐν τῇ ἀληθείᾳ as equivalent to" by the aid of," with the instrumentality of, "the truth:" consecrate them, by revealing to them the reality, making known to them the truth. If they see the truth they will be discharged from the illusions of the world, the flesh, and the devil. (Luther takes
ἐν τῇ ἀληθείᾳ adverbially, and as equivalent to "
verily and indeed; but this cannot well be, seeing the article is present, and taking account of the subsequent definition of
ἀληθεία, it becomes improbable.) But what is "
truth"? what is the full expression of reality? how are we to know where to find it?
Thy Logos (thy Word), the utterance of thy thought,
is truth. If we can ever cognize what is the Divine thought about anything, we shall reach the absolute truth. What God troweth is truth per
se. The Logos of God, the full, God-chosen utterance of the reality of truth, is the nearest approach to truth that we possess. This revelation of God is the closest correspondence with the reality. God sanctifies his children, consecrates them to the service of his kingdom by revealing the truth, by making known the otherwise transcendental facts of his kingdom. A long controversy has prevailed in the Church as to whether the Spirit's gracious operations are or are not limited by the operation of truth on the mind. Numerous assurances of the New Testament seem thus to limit the grace of God, or to measure it by the ordinary effect produced on the understanding by Divine truth; e.g. "Of his own will begat he us by the Word of truth;" the parable of the sower, and other Scriptures. But seeing that the regeneration, the conference of new and supernatural life, is set forth by images of resurrection and new creation, and as a purification of taste, bias, and desire, the gift of a new heart and right spirit, the voice of a heavenly sonship crying within us, "Abba, Father," and seeing that the ministration of the Spirit is variously directed and operative, and that there is shadowed forth an immediate work on the heart," back of consciousness" itself, and that the witness of the Spirit and the teaching and indwelling of the Holy Ghost are continually referred to, - we are loath to accept the dogma. The Spirit of God is not limited to the normal operations of the Word.
Parallel Commentaries ...
Greek
Sanctifyἁγίασον (hagiason)Verb - Aorist Imperative Active - 2nd Person Singular
Strong's 37: From hagios; to make holy, i.e. purify or consecrate; to venerate.themαὐτοὺς (autous)Personal / Possessive Pronoun - Accusative Masculine 3rd Person Plural
Strong's 846: He, she, it, they, them, same. From the particle au; the reflexive pronoun self, used of the third person, and of the other persons.byἐν (en)Preposition
Strong's 1722: In, on, among. A primary preposition denoting position, and instrumentality, i.e. A relation of rest; 'in, ' at, on, by, etc.theτῇ (tē)Article - Dative Feminine Singular
Strong's 3588: The, the definite article. Including the feminine he, and the neuter to in all their inflections; the definite article; the.truth;ἀληθείᾳ (alētheia)Noun - Dative Feminine Singular
Strong's 225: From alethes; truth.Yourσὸς (sos)Personal / Possessive Pronoun - Nominative Masculine 2nd Person Singular
Strong's 4674: Yours, thy, thine. From su; thine.wordλόγος (logos)Noun - Nominative Masculine Singular
Strong's 3056: From lego; something said; by implication, a topic, also reasoning or motive; by extension, a computation; specially, the Divine Expression.isἐστιν (estin)Verb - Present Indicative Active - 3rd Person Singular
Strong's 1510: I am, exist. The first person singular present indicative; a prolonged form of a primary and defective verb; I exist.truth.ἀλήθειά (alētheia)Noun - Nominative Feminine Singular
Strong's 225: From alethes; truth.
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NT Gospels: John 17:17 Sanctify them in your truth (Jhn Jo Jn) 
