Regardless of what they claim, a professing Christian without mortification has only shallow thoughts about sin, especially sins of daily weakness. The core of an unmortified lifestyle is the tolerance of sin without any inner disgust. When someone can conceive of grace and mercy in such a way that they can easily tolerate and accept daily sins without any bitterness, that person is on the brink of turning God's grace into an excuse for sinful behavior and becoming hardened by sin's deceitfulness (Jude 1:4; Hebrews 3:13).
