John 17:19. “I sanctify Myself…” The idea behind this is: “I dedicate, I consecrate, I set apart My whole self including – Person, offices, fullness, righteousness, interests, existence for this purpose.” For a purpose – for their sakes. We live a life of faith, and that is a life of sanctification. The ground of sanctification is who He is and what He has done; not who we are and what we have done. We cannot be more sanctified then we are because He cannot love us more, be more perfect or accepted, be made more suitable for glory. Truly sanctified has not to do with our persons, the natural man or the flesh; but for illumination of mind and heart through the truth.
John 17:19