“Yet now he has reconciled you to himself through the death of Christ in his physical body. As a result, he has brought you into his own presence, and you are holy and blameless as you stand before him without a single fault.” - Colossians 1:22
Christ has perfected us in Him with His faith. But, it does not manifest in exactly the same way for all people. Every individual is unique with a past and influences that plague our minds and the way we think. Each of us in our own way is catching the revelation that we are perfect in Christ. Time does not fix us. We are not changing; we are not in a time-process of becoming holy. We are holy; the only process we are in is the process of discovering how holy we’ve become when we were made new.
Paul Oakley writes in his song , “For your power at work in me is changing me.” But it is not about me changing, because my old man (old self) is dead, and now I am alive in Christ. I have an exchanged life; I exchanged my old life for a new life in Him. I am now being transformed by the renewing of my mind into my new life, and even then it is not about me and the time it takes, it is all about Christ and His transformation that has already happened to me.