ABSTRACT
As a psychological symbol the Trinity denotes, first, the homoousia or essential unity of a three-part process, to be thought of as a process of unconscious maturation taking place within the individual. To that extent the three Persons are personifications of the three phases of a regular, instinctive psychic occurrence that always tends to express itself in the form of mythologems and ritualistic customs. Second, the Trinity denotes a process of conscious realization continuing over the centuries. Third, the Trinity lays claim not only to represent a personification of psychic processes in three roles, but to be the one God in three Persons, who all share the same divine nature. The homoousia, whose general recognition was the cause of so many controversies, is absolutely necessary from a psychological standpoint, because, regarded as a psychological symbol, the Trinity represents the progressive transformation of one and the same substance, namely the psyche as a whole.
