Sin is deceptive. It is like an apple worm, which is really codling moth larva. On the outside of the apple you see a small hole, a little blemish. But when you open the apple up it is ruined.
There are few experiences that equal biting into a crisp, flavorful apple, but few worse than finding half a worm in the remaining portion.
Sin we destroy you life from the inside out just like the codling moth larva, or apple worn. You might be able to hide the blemish from the rest of the world, but you are ruined on the inside just the same.
You know everyone who sees you is seeing a mask, because you are too guilty to show them the real you.