Biblically speaking, the power of our obedience and the source of our holiness is not our efforts but the finished work of Jesus Christ. It’s God who works in us to will and to work (Phil. 2:12–13). Our good works were ordained beforehand (Eph. 2:10). The same gospel that empowers our conversion empowers our sanctification (Titus 2:11–12; 1 Cor. 15:1–2; Rom. 8:30). It is Jesus who both authors our faith and perfects it (Heb. 12:2). It is God alone who is faithful both to start the work in us and to complete it (Phil. 1:6).