By isolation I here mean a fully arbitrary dismissal from consciousness of all disturbing and destructive thought and feeling. (Engström: “One should not think, it is just confusing.”) A perfect and almost brutalising variant is found among certain physicians, who for self-protection will only see the technical aspect of their profession. It can also decay to pure hooliganism, as among petty thugs and medical students, where any sensitivity to the tragic side of life is eradicated by violent means (football played with cadaver heads, and so on.)