" You must realize, Mr. Blaine, that a man is not his body, for he receives his body accidentally. He is not his skills, for those are frequently born of necessity. He is not his talents, which are produced by heredity and by early environmental factors. He is not the sicknesses to which he may be predisposed, and he is not the environment that shapes him. "

― Robert Sheckley , Immortality, Inc.