Moral obligation always implies gracious ability. In every "ought" there is an implied "can."
But the endowment of the Spirit is not limited to his negative efficiency in the destruction of evil in the inner man. He is the ally of the believer in his offensive war against sin in others, in advancing the kingdom of God by aggression upon the ranks of Christ's enemies. When this ally is neglected there is no progress; the chariot wheels of King Jesus are taken off and the hosts of Satan prevail.
— edited from Jesus Exultant Chapter 11.