Finally someone in the psychological community explicitly writes about the sociopath's elastic sense of self:
“In fact, most sociopathy involves an individual’s not having significantly developed, across the board, a general capacity to identify with things in the world. It is not just that he is lacking a strongly identified moral identity, he is likely lacking a strongly identified self identity almost altogether… His life is largely about a narcissistic satisfaction of desires, not an expression of autonomous valuated personal projects. It should be no surprise that the sociopath typically feels no qualms of lost integrity when he violates some generally accepted moral dictum. The issue here for him isn’t really specifically about a lack of internal response to some failed morality on his part. Rather, it’s about general self identity integrity just not being a question for him. If a person has no strong sense of self in general, then of course he will probably have no strong sense of lost integrity when he violates life projects which for the rest of us would be central parts of our self identities. In a nutshell, it’s not that the sociopath lacks moral integrity specifically; he lacks general self identity integrity, of which moral identity integrity is only a possible part. So a lack of, say, a moral conscience, isn’t really the central problem for the sociopath. What’s more at the heart of things is his lack of moral identification, along with the lack of any other significant life identifications.”As I said before, many psychologists understand the “what” but not the “how.” The psychologist who wrote this, however, gets it just about right.