This was the Fourth Council of Constantinople (869-870 AD), the eighth ecumenical council recognized by the Catholic Church… In Canon 11, the bishops anathematized those who taught that man has ‘two souls,’ affirming instead that the human being possesses ‘one rational and intellectual soul’
Peterson identifies Canon 11 of the Fourth Council of Constantinople as the formal ecclesiastical codification of the suppression of the feeling soul, completing a philosophical process already underway in Western thought.
, The Abolished Middle: Retrieving the Thumotic Soul from the Unconscious, 2026thesis