Because of all the previous qualities we have already discussed in this series on our identity in Christ, we are also a made-new child of God. To obtain this identity, all we need to do is accept Christ as our Savior, “Therefore, if anyone is in Christ, the new creation has come: The old has gone, the new is here!” (2 Corinthians 5:17 NIV). This Scripture says that in Christ we are each a new creation; the old has past and the new has come. Gary Burge in The Baker Illustrated Bible Commentary does an excellent job of further explaining the idea of being made-new,
Anyone who is in Christ has already become a part of a new creation. They have passed beyond the point of living solely as a part of the old creation and have begun to live as a part of the new created order. Moreover, the source of such new creation is God, whose work, as in the creation accounts of the OT [Old Testament], forms the decisive beginning for it (1315).
Being made-new is not only our identity, but also it is a promise from God. Once we receive the gift of salvation, we no longer are stuck in the past. Our sins have been forgiven and more importantly, forgotten. We do not need to let anyone or even ourselves try and define us by what we used to be. We are new creations in Christ Jesus. Everything is the past needs to stay right there. Live in the present and look to the future.