If Regeneration has to do with our nature, Justification with our
standing, and Adoption with our position, then Sanctification has
to do with our character and conduct. In Justification we are declared
righteous in order that, in Sanctification, we may become righteous.
Justification is what God does for us, while Sanctification is what
God does in us. Justification puts us into a right relationship with
God, while Sanctification exhibits the fruit of that relationship--a
life separated from a sinful world and dedicated unto God.