
Because God has regenerated our hearts, we get to be continually transformed and can put off the old life, nature, self, because the Holy Spirit replaces those old things with new, glorified, redeemed ones. We now (because of Jesus) have been created after the likeness of God and therefore have the ability (through the working of the Holy Spirit) to live a new and transformed life of faith. This is all part of the regenerated work that the Holy Spirit is doing in us, while progressive sanctification is continuing to take place.
We must remember that our struggles and sins no longer have control over us. When they do creep up on us, we need to take them to God through prayer, while continuing to search the Scriptures, remembering that Jesus died to conquer all sin, separation from God, and all death (which is what sin ultimately leads to). We must remember that Jesus has accomplished our salvation and has reconciled us back to God, Jesus is our continual advocate to the Father, and the Holy Spirit is continually working out our salvation and sanctification, so that we can be new creations that worship God and Glorify Him with our redeemed lives.
The encouragement today is to believe that we are new creations in Christ. Start to practice the truths found in the Scriptures, and live as though these truths are actually TRUE. Forget the past, forget what we used to be (before Jesus), and remember that God sees us washed by the blood of Jesus. While we often fail and don't see ourselves whole, God sees us in the light of Jesus, completely spotless and sin free. Live in the moment and truth that God is working everything out through the power of His Glory and Grace. Believe that you are changed and new, and let that truth be lived out in radical submission to the mortification of sin and the Glorification of God.