The impure thought life is the life of a thief. You’re stealing images that aren’t yours. When you had premarital sex, you touched someone who didn’t belong to you. When you looked down the blouse of a woman who isn’t your wife, you were stealing something that isn’t yours to take. It’s just like walking down Main Street behind someone who drops a one-hundred-dollar bill out of his pocket, and you pick it up. That money isn’t yours–even if he didn’t know he lost it. If you choose to keep the money instead of saying, “Hey, Mister,” then you’ve taken something you’re not entitled to.
When we’re thieves with our eyes, we’re embezzling sexual gratification from areas that don’t belong to us, from women who aren’t connected to us.