Inherited psychic substance is a curious concept, because whether or not there is a genetic basis or parallel to it, it is stated baldly by the aggregation of family horoscopes, and its manifestations are so often couched in dreams and fantasies rather than in physical characteristics or behavioural patterns.
Greene argues that inherited psychic substance is empirically attested by the recurrence of planetary patterns in family charts, manifesting primarily in unconscious imagery rather than somatic or behavioral traits.
, The Astrology of Fate, 1984thesis