Those who give themselves to these studies do not necessarily suffer a diminution of their intellectual integrity or emotional balance, although a proportion do. This is because they are already neurotic, hysteric, or irrational types. Such a person should first attend, or get a psychologist to attend, to the restoration of mind or character, and leave mysticism alone until this is done.

-- Notebooks Category 16: The Sensitives > Chapter 12: The Intermediate Zone > # 53