Mental illness comes in many qualities and many degrees, from the young patient with low self-esteem and incomplete psychosexual development, to the patient with severe depression, anxiety, personality disturbances, social phobia, paranoia, mental delusions, or even severe autism, and schizophrenia with hallucinations and complete lack of sense of coherence and sense of reality. The fundamental idea of mental disorders in holistic psychiatry is that they ascend from existential isolation that grows from a specific lack of self-insight and understanding of the inner logic of life. This book presents and discusses the principles of holistic psychiatry in order to increase the use of this treatment among patients diagnosed with a mental illness.