Transpersonal Psychology has a viewpoint focused on the abstract psyche(s) (soul(s):) spirit, intelligence, consciousness (synonyms.)
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This (definition and list above) is mere 'tip of the iceberg:' Transpersonal Psych. (or synonyms) must understand or at least apply (therefore understand!) all other topics (schools, relevant ideas) in Psychology. Particularly, Phiolosophy has 'study areas' or 'sciences' that make a larger 'science' category specfically with Biology and Psychology.