"When you've eliminated the impossible, whatever remains,
however improbable, must be the truth."
Now add to this strange fantasy the ability to conceal from other people that your psychological makeup is radically different from theirs. Since everyone simply assumes that conscience is universal among human beings, hiding the fact that you are conscience-free is nearly effortless. You are not held back from any of your desires by guilt or shame, and you are never confronted by others for your cold-bloodedness. The ice water in your veins is so bizarre, so completely outside of their personal experience, that they seldom even guess at your condition. In other words, you are completely free of internal restraints, and your unhampered liberty to do just as you please, with no pangs of conscience, is conveniently invisible to the world."