Narcissism is an orientation in which all one’s interest and passion are directed to one’s own person: one’s body, mind, feelings, interests… For the narcissistic person, only he and what concerns him are fully real; what is outside, what concerns others, is real only in a superficial sense of perception; that is to say, it is real for one’s senses and for one’s intellect. But it is not real in a deeper sense, for our feeling or understanding. He is, in fact, aware only of what is outside, inasmuch as it affects him. Hence, he has no love, no compassion, no rational, objective judgment. The narcissistic person has built an invisible wall around himself. He is everything, the world is nothing. Or rather: He is the world.
– Fromm, The Art of Being, via brainpickings (as per.)