Mortification is the soul's vigorous opposition to self, wherein sincerity is most evident.
John OwenFaith is the leading grace in all our spiritual warfare and conflict; but all along while we live, it hath faithful company that adheres to it, and helps it. Love works, and hope works, and all other graces, — self-denial, readiness to the cross, — they all work and help faith. But when we come to die, faith is left alone. Now, try what faith will do.
John OwenSin also carries on its war by entangling the affections and drawing them into an alliance against the mind. Grace may be enthroned in the mind, but if sin controls the affections, it has seized a fort from which it will continually assault the soul. Hence, as we shall see, mortification is chiefly directed to take place upon the affections.
John Owen