The demands and commands of Scripture are impossible. No human can pull it off. None.
The problem is that our hearts are tainted and focused on the wrong thing. God is absent from the natural heart and is the seat of corruption.
The Bible is clear and consistent on the point that a man must be born again. He must be given a new heart. There is no work you can do that will create in you a new heart.
Our only recourse is calling upon God, as David did, and cry out, “Create in me a clean heart.” The Puritan George Swinnock said, “There is no sin but it is dressed in the drawing-room of the heart, before it appear on the stage of the life.”
The heart must be cleaned, made new, renewed, changed fundamentally and wholly. This is the essence of Christianity–Not a better last half, but a new beginning.