NKJV: John 17:17
Sanctify them by Your truth. Your word is truth.
This makes sense. Sanctification is division. God's word seperates us from the world around us - clearly marking us for Jesus. Another scripture that shows the divisive action of God's word is
NKJV: Heb 4:12
For the word of God is living and powerful, and sharper than any two-edged sword...