Would you keep as a pet something whose only goal is to harm you, to kill you?

Those aren’t “pet sins”,
But “familiar demons”.

A great excerpt from a wonderful article I read:

The Lizard Upon the Shoulder

But many have tried. C.S. Lewis depicts this philosophy pictured above in The Great Divorce. In the book, a Ghost who has been kept out of heaven tries to keep his pet sin, a red lizard. In the scene, the Ghost constantly scolds the pet upon his shoulder. An angel asks the Ghost if he would like the lizard silenced.

“Of course I would,” said the Ghost.

“Then I will kill him,” said the Angel, taking a step forward.

“Oh — ah — look out! You’re burning me. Keep away,” said the Ghost retreating.

“Don’t you want him killed?”

“You didn’t say anything about killinghim at first. I hardly meant to bother you with anything so drastic as that.”

“It’s the only way,” said the Angel, whose burning hands were now very close to the Lizard. “Shall I kill it?”

“ . . . ”

“Well, there’s time to discuss that later.”

“There is no time. May I kill it.”

“Please, I never meant to be such a nuisance. Please — really — don’t bother. Look! It’s gone to sleep of its own accord. I’m sure it’ll be all right now. Thanks ever so much.”

“May I kill it?”

“Honestly, I don’t think there’s the slightest necessity for that. I’m sure I shall be able to keep it in order now. I think the gradual process would be far better than killing it.”

“The gradual process is of no use at all.”

More excuses are given, but now we overhear the lizard whispering in his ear,

“Be careful,” it said. “He can do what he says. He can kill me. One fatal word from you and he will! Then you’ll be without me for ever and ever. It’s not natural. How could you live? You’d be only a sort of ghost, not a real man as you are now. He doesn’t understand. He’s only a cold, bloodless abstract thing. It may be natural for him, but it isn’t for us. Yes, yes. I know there are no real pleasures now, only dreams. But aren’t they better than nothing? And I’ll be so good. I admit I’ve sometimes gone too far in the past, but I promise I won’t do it again. I’ll give you nothing but really nice dreams — all sweet and fresh and almost innocent. You might say, quite innocent . . . ”

It is easy to fall into patterns of training our sin rather than killing it.

If your biggest reason to fight sin is that you don’t want to confess it again to an accountability group, you’re training your sin. If you only pray about the sin after you’ve “done it again,” you’re training your sin. If you do not seek Christ’s presence, if you do not commune with him in prayer and his word, if you do not invite believers into your life to stick daggers into your sin, you are training your sin to play dead without killing it.

Read the full article here:

https://www.desiringgod.org/articles/how-to-train-your-dragons