Dying Inside by Robert Silverberg

David Selig was born with an awesome power -- the ability to look deep into the human heart, to probe the darkest truths hidden in the secret recesses of the soul. With reckless abandon, he used his talent in the pursuit of pleasure. Then, one day, his power began to die... Universally acclaimed as Robert Silverberg's masterwork, "Dying Inside is a vivid, harrowing portrait of a man who squandered a remarkable gift, of a superman who had to learn what it was to be human.(less)