Imagine — if you can — not having a conscience, none at all, no feelings of guilt or remorse no matter what you do, no limiting sense of concern for the well-being of strangers, friends, or even family members. Imagine no struggles with shame, not a single one in your whole life, no matter what kind of selfish, lazy, harmful, or immoral action you had taken … You can do anything at all, and still your strange advantage over the majority of people, who are kept in line by their consciences, will most likely remain undiscovered. How will you live your life? What will you do with your huge and secret advantage?”

— Martha Stout, The Sociopath Next Door