Pilgrim's Progress §376: Though the consciences of such men are awakened, yet their minds are not changed; there...

1. Though the consciences of such men are awakened, yet their minds are not changed; therefore, when the power of guilt weareth away, that which provoked them to be religious ceaseth, wherefore they naturally turn to their own course again, even as we see the dog that is sick of what he has eaten, so long as his sickness prevails he vomits and casts up all; not that he doth this of a free mind (if we may say a dog has a mind), but because it troubleth his stomach; but now, when his sickness is over, and so his stomach eased, his desire being not at all alienate from his vomit, he turns him about and licks up all, and so it is true which is written, "The dog is turned to his own vomit again." Thus I say, being hot for heaven, by virtue only of the sense and fear of the torments of hell, as their sense of hell and the fears of damnation chills and cools, so their desires for heaven and salvation cool also. So then it comes to pass, that when their guilt and fear is gone, their desires for heaven and happiness die, and they return to their course again.