Conscience

So we poked along back home, and I warn't feeling so brash as I was before, but kind of ornery, and humble, and to blame, somehow -- though I hadn't done nothing. But that's always the way; it don't make no difference whether you do right or wrong, a person's conscience ain't got no sense, and just goes for him anyway. If I had a yaller dog that didn't know no more than a person's conscience does I would poison him. It takes up more room than all the rest of a person's insides, and yet ain't no good, nohow.

--Mark Twain, The Adventures of Huckleberry Finn