I do not say for a moment that holiness shuts out the presence of indwelling sin. No: far from it. It is the greatest misery of a holy man that he carries about with him a “body of death;”–that often when he would do good “evil is present with him”; that the old man is clogging all his movements, and, as it were, trying to draw him back at every step he takes. (Rom. vii. 21.). But it is the excellence of a holy man that he is not at peace with indwelling sin, as others are. He hates it, mourns over it, and longs to be free from its company. The work of sanctification within him is like the wall of Jerusalem–the building goes forward “even in troublous times.” (Dan. ix. 25.)
–J.C. Ryle, Holiness: Its Nature, Hindrances, Difficulties, and Roots
according to Script 