Sanctification means to be set apart for the use of Jehovah.

It means the process of making us meet to be partakers of the inheritance of the saints in light.
(Colossians 1:12) It is the process of perfecting the saints.

(Ephesians 4:12) This process begins when Jehovah accepts our consecration and begets us; and must continue until birth upon the spirit plane.
[342]Sanctification, then, is to be made holy, in the likeness of our Lord.

Concerning such Jesus said: "Sanctify them through thy truth; thy word is truth".

(John 17:17) The Christian now must feed upon or study the Word of God, learn its principles, learn of Jehovah's character and that of the Lord Jesus, and strive to conform his own life thereto.