It being our duty to mortify... we must be at work. He that is appointed to kill an enemy, if he leave striking before the other ceases living, does but half his work.
John OwenIt is the Spirit alone that can mortify sin; he is promised to do it, and all other means without him are empty and vain. How shall he, then, mortify sin that has not the Spirit? A man may easier see without eyes, speak without a tongue, than truly mortify one sin without the Spirit.
John OwenWhat do we want? What would we be at? What do our souls desire? Is it not that we might have a more full, clear, stable comprehension of the wisdom, love, grace, goodness, holiness, righteousness, and power of God, as declared and exalted in Christ unto our redemption and eternal salvation?
John OwenThe vigour, and power, and comfort of our spiritual life depends on the mortification of the deeds of the flesh...The choicest believers, who are assuredly freed from the condemning power of sin, ought yet to make it their business all their days to mortify the indwelling power of sin...Do you mortify; do you make it your daily work; be always at it whilst you live; cease not a day from this work; be killing sin or it will be killing you.
John Owen