Warning! Uninformed pop psychology ahead! I know Freud is dead! But maybe you all who know more can clue me in...
If the Id = our animal nature, our instincts and traits that help us in our struggle for survival (selfish)
and Ego = our emotional life (reactive)
and Superego = our best self (altruistic), that which resists selfishness and our Id
Could it be said that our Superego is our soul? And does it follow that our soul is supernatural in that it overcomes our natural selfish instincts?
OK, release the hounds!
Freud is describing the mind which does not even include the physical body. I don't think his nomenclature covers the "soul". To my estimation the soul is associated with the body at conception. The soul is not contained within the body and the body is not contained within the soul, so there's no easy description of that "association".
Man's intellect and rationality is tightly linked to the soul--Abdu'l Baha describes that union as "the rational soul". He puts it better than I:
"The human spirit which distinguishes man from the animal is the rational soul; and these two names -- the human spirit and the rational soul -- designate one thing. This spirit, which in the terminology of the philosophers is the rational soul, embraces all beings, and as far as human ability permits discovers the realities of things and becomes cognizant of their peculiarities and effects, and of the qualities and properties of beings. But the human spirit, unless assisted by the spirit of faith, does not become acquainted with the divine secrets and the heavenly realities. It is like a mirror which, although clear, polished, and brilliant, is still in need of light. Until a ray of the sun reflects upon it, it cannot discover the heavenly secrets.
But the mind is the power of the human spirit. Spirit is the lamp; mind is the light which shines from the lamp. Spirit is the tree, and the mind is the fruit. Mind is the perfection of the spirit, and is its essential quality, as the sun's rays are the essential necessity of the sun."
(Abdu'l-Baha, Baha'i World Faith - Abdu'l-Baha Section, p. 316)
Regards,
Scott