The end of sanctification is the gospel having its full effect in our lives.

This means perfect conformity to the image of Christ and the eradication of all that contradicts such conformity. Sin is what contradicts it.

So as we are being sanctified, our sin is being ridded or put down and the reality of the gospel is advancing to affect every facet of who we are.

We are a contraction. We are new creatures in Jesus Christ–the old has passed away, the new has come– and yet we are told to cleanse ourselves of every defilement. The old is still there and is a contradiction to the gospel reality of the New Covenant. Sanctification involves the cleansing ourselves of sin which is to say, eradicating all the contradictions within us to the truth that we are new creatures in Jesus Christ.