[John 17:17-19] Sanctify them in the truth; Your word is truth. As You sent Me into the world, I also have sent them into the world. For their sakes I sanctify Myself, that they themselves also may be sanctified in truth.
Truth sanctification speaks of conformation and dedication to the quality of the heavenly truth in which hypocrisy, double-mindedness or ulterior motives are never possible. Even Jesus sanctified Himself for us so that we might abide in Him.
[John 18:37] Therefore Pilate said to Him, “So You are a king?” Jesus answered, “You say correctly that I am a king. For this I have been born, and for this I have come into the world, to testify to the truth.
Jesus came to bring this complete honesty and straightforwardness—the brightest of all lights in existence—to earth. Those who are of the truth kind will hear and will come to Him; and also to those who preach the truth in His name.
[John 18:38] Everyone who is of the truth hears My voice. Pilate said to Him, “What is truth?” (39) And when he had said this, he went out…