Free from Sin, Slaves of Righteousness
You cannot receive Christ as your justification only, and then, later, decide to refuse or to accept Him as your sanctification. He is one and indivisible, and if you receive Him at all, at once He is made unto you “wisdom and righteousness and sanctification and redemption.” You cannot receive Him as your Saviour only, and later decide to accept or refuse Him as your Lord; for the Saviour is the Lord who by His death has [bought] us and therefore owns us. Sanctification is nowhere taught or offered in the New Testament as some additional experience possible to the believer. It is represented rather as something which is already within the believer, something which he must realise more and more and in which he must grow increasingly.
D. Martyn Lloyd-Jones