Who is Dr. Leon Stone from Valis and what is their importance?

One of the most important people in Horselover Fat's life, Stone is the psychiatrist in charge of the North Ward at the Orange County Mental Hospital (OCMH) while Fat is under evaluation following a suicide attempt. Stone believes that the act represents a breakthrough reaching out toward reality. He offers Fat homeopathic Bach remedies to remove his major problems: helplessness, fear, and an inability to act. Fat sees Stone as being crazy in a good way and appreciates being talked to as a human being. Stone lends him a copy of Lao Tzu's Tao Te Ching to work on anger issues.