Old neglected wounds are often mortal, always dangerous. Indwelling distempers grow rusty and stubborn by continuance in ease and quiet. Lust is such an inmate as, if it can plead time and some prescription, will not easily be ejected. As it never dies of itself, so if it be not daily killed it will always gather strength.
– John Owen –
from The Mortification of Sin in Believers, volume 6 of Works, page 44