An excerpt from "Theology Of Work.org" entitled, "Chosen to be Holy and Blameless" states:
"We are not chosen because of our own perfection or ability to be perfected. Rather, we are chosen in and through Christ, who did offer himself as the blameless sacrifice. Thus, our blamelessness is not earned, but conferred in Christ by God's grace.
Yet, this does not mean that our behavior is irrelevant. Indeed, through God's Spirit, we are to live out who we are in Christ. As Paul explains to the Romans, we are to present our bodies "as a living sacrifice, holy and pleasing to God" (Rom. 12:1). We do this by offering ourselves to God each day, seeking to live in a way that honors him and advances his kingdom in the world. When we fail–and we always do this side of the age to come–we rest in the assurance that we belong to God "in Christ" and not by our own merits. With this confidence, and with the help of the Spirit, we press on to be the holy, blameless people God has chosen us to be, for his glory." This article may be viewed at: Chosen to be Holy and Blameless/theologyofwork.org
Reference: Philippians 2:15