Grief causes you to leave yourself. You step outside your narrow little pelt. And you can’t feel grief unless you’ve had love before it - grief is the final outcome of love, because it’s love lost. […] It’s the cycle of love completed: to love, to lose, to feel grief, to leave, and then to love again. Grief is the awareness that you will have to be alone, and there is nothing beyond that because being alone is the ultimate final destiny of each individual living creature. That’s what death is, the great loneliness.
Philip K. DickA 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. Dick