A human being without the proper empathy or feeling is the same as an android built so as to lack it, either by design or mistake. We mean, basically, someone who does not care about the fate which his fellow living creatures fall victim to; he stands detached, a spectator, acting out by his indifference John Donne's theorem that "No man is an island," but giving that theorem a twist: that which is a mental and a moral island is not a man.
Philip K. DickThe psychotic does not merely think he sees four blue bivalves with floppy wings wandering up the wall; he does see them. An hallucination is not, strictly speaking, manufactured in the brain; it is received by the brain, like any 'real' sense datum, and the patient act in response to this to-him-very-real perception of reality in as logical a way as we do to our sense data. In any way to suppose he only 'thinks he sees it' is to misunderstand totally the experience of psychosis.
Philip K. Dickbut as he plodded along a vague and almost hallucinatory pall hazed over his mind; he found himself at one point, with no notion of how it could be, a step from an almost certain fatal cliffside fall—falling humiliatingly and helplessly, he thought; on and on, with no one even to witness it. Here there existed no one to record his or anyone else's degradation, and any courage or pride which might manifest itself here at the end would go unmarked: the dead stones, the dust-stricken weeds dry and dying, perceived nothing, recollected nothing, about him or themselves.
Philip K. DickThe tragedy in his life already existed. To love an atmospheric spirit. That was the real sorrow. Hopelessness itself. Nowhere on the printed page, nowhere in the annals of man, would her name appear: no local habitation, no name. There are girls like that, he thought, and those you love most, the ones where there is no hope because it has eluded you at the very moment you close your hands around it.
Philip K. Dick