Sanctify them through thy truth: thy word is truth.

JOHN 17:17KJV
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John 17:17 (KJV)

What does John 17:17 mean?

John 17:17 means that Jesus is asking God the Father to set apart his followers, making them holy, by means of the truth, which Jesus identifies as God’s word. The verse highlights that the truth found in God’s word is the means by which people are made holy for God’s purposes.

In this verse, Jesus is praying to God on behalf of his disciples during what is often called the “High Priestly Prayer,” just before his arrest. Jesus is not only asking for their protection but also for their transformation. The focus is on being “sanctified”—set apart for God—through the truth, with a clear statement that God’s word is the source and standard of that truth.

The Greek behind John 17:17

  • ἁγίασον (hagiason, “sanctify”): This word means to make holy, set apart, or dedicate for a special purpose. Here, Jesus is asking God to actively set his followers apart for God’s service.
  • ἀληθείᾳ (alētheia, “truth”): This Greek word often carries the sense of what is real, reliable, and trustworthy. Jesus connects this truth directly to God’s word, emphasizing that God’s message is not just true, but the very standard of truth.
  • λόγος (logos, “word”): This term refers to God’s message, teaching, or revelation. Jesus is saying that it is specifically God’s word that brings about this sanctifying effect, not just any truth in general.

Why John 17:17 matters

  • John 17:17 clarifies that holiness or being set apart is not achieved by human effort or ritual, but through God’s truth as revealed in his word.
  • The verse shows that Jesus sees God’s word as the ultimate source of truth, not just one truth among many.
  • This request is part of a larger prayer where Jesus is preparing his followers for life without his physical presence, emphasizing that God’s word will continue to guide and shape them.

Where else these words appear

“thy” Greek G4674 · used in 24 verses

  • Matthew 7:3 And why beholdest thou the mote that is in thy brother's eye, but considerest not the beam that is in thine own eye?
  • Mark 5:19 Howbeit Jesus suffered him not, but saith unto him, Go home to thy friends, and tell them how great things the Lord hath done for thee, and hath had compassion on thee.
  • John 17:10 And all mine are thine, and thine are mine; and I am glorified in them.

“Sanctify” Greek G37 · used in 26 verses

  • Matthew 6:9 After this manner therefore pray ye: Our Father which art in heaven, Hallowed be thy name.
  • Romans 15:16 That I should be the minister of Jesus Christ to the Gentiles, ministering the gospel of God, that the offering up of the Gentiles might be acceptable, being sanctified by the Holy Ghost.
  • Hebrews 2:11 For both he that sanctifieth and they who are sanctified are all of one: for which cause he is not ashamed to call them brethren,

“truth” Greek G225 · used in 99 verses

  • Matthew 22:16 And they sent out unto him their disciples with the Herodians, saying, Master, we know that thou art true, and teachest the way of God in truth, neither carest thou for any man: for thou regardest not the person of men.
  • Romans 2:8 But unto them that are contentious, and do not obey the truth, but obey unrighteousness, indignation and wrath,
  • 1 Timothy 6:5 Perverse disputings of men of corrupt minds, and destitute of the truth, supposing that gain is godliness: from such withdraw thyself.