He does not so work our mortification in us as not to keep it still an act of our obedience. The Holy Ghost works in us and upon us, as we are fit to be wrought in and upon; that is, so as to preserve our own liberty and free obedience. He works upon our understandings, wills, consciences, and affections, agreeably to their own natures; he works in us and with us, not against us or without us; so that his assistance is an encouragement as to the facilitating of the work, and no occasion of neglect as to the work itself. And, indeed, I might here bewail the endless, foolish labour of poor souls, who, being convinced of sin, and not able to stand against the power of their convictions, do set themselves, by innumerable perplexing ways and duties, to keep down sin, but, being strangers to the Spirit of God, all in vain. They combat without victory, have war without peace, and are in slavery all their days. They spend their strength for that which is not bread, and their labour for that which profits not.