The solution for sin is not to muster up your strength and to try and try to start obeying. You cannot start obeying. That is the problem. Rather, the solution for sin is to start believing – to begin putting our reliance upon the One in whom is the power of the resurrection. Then, as God gives grace and Truth, you may start obeying by faith.
There is this idea among Christians that God will somehow give us a THING called power, or give us a stronger will. God gives us Christ. We need a stronger faith in HIM. In fact, if we want to know how to exercise our power of free choice it is this: To put our faith in the One who dwells in us. Christ is the power of God.