Sin, indeed, maintains an enmity against all duties of obedience, or rather against God in them. "When I would do good," says the apostle, "evil is present with me" (Rom 7:21)—that is, "Whenever I would do good, or whatsoever good I would do (that is, spiritually good, good in reference to God), sin is present with me to hinder me from the good, to oppose me in it." On the other side, all duties of obedience lie directly against the actings of the law of sin; for as the flesh in all its actings lusts against the Spirit, so the Spirit in all its actings lusts against the flesh.