Aristotle's psychology, given in his treatise On the Soul (peri psychēs), posits three kinds of soul ("psyches"): the vegetative soul, the sensitive soul, and the rational soul.
ˈæɹɪstˌɑːɾəlz saɪkˈɑːlədʒi, ɡˈɪvən ɪn hɪz tɹˈiːɾɪz ɔnðə sˈoʊl pˈɛɹi sˈaɪkᵻz, pˈɑːzɪts θɹˈiː kˈaɪndz ʌv sˈoʊl"sˈaɪkiːᵻz": ðə vˈɛdʒɪtˌeɪɾɪv sˈoʊl, ðə sˈɛnsᵻtˌɪv sˈoʊl, ænd ðə ɹˈæʃənəl sˈoʊl.