Thank you. But the bible shows different functions of the soul and spirit in Mary’s praise of the Lord:
“And Mary said, My soul magnifies the Lord, and my spirit has exulted in God my Savior.” Luke 1:46-47
Is it the same in a fetus ?
Yes, they are distinct things. I could only suppose that they would be as distinct to a fetus as to anyone else since I can’t imagine how a soul and spirit could at any point be the same thing. I don’t think that one of them could give rise to the other since the spirit is immortal but the soul is mortal.
Different (newer) translations of the Bible often use spirit and soul interchangeably, which unfortunately adds to the confusion about this subject. It is impressive that you noticed this distinction while most of the Christians I’ve had this conversation with go through their lives assuming that soul and spirit are only synonyms.
In the King James Version, which is the only English translation I study from, the Greek word psuche is translated as soul, and pneuma is translated as spirit. Psuche is the animating life force and basic sentience which all living creatures have. If Freud had been interested in the scriptures, I think he might have said that that this would compose the id and ego part of the mind. Personally, I don’t like Freud, so I just say that the mind, psuche, and soul are different words for the same thing. The pneuma, is a bit more mysterious to me, as I suppose it should be. Only human beings have this pneuma, which endures after our bodies perish. I like to associate the pneuma/spirit with that special part of our being we figuratively call our “heart”, which also I think Freud would have associated with his superego. The spirit is how it is possible to dwell with God through the mediator, Christ, for “No man hath seen God [the Father] at any time,” (John 1:18), and again “God is a spirit: and they that worship Him must worship Him in spirit and in truth” (John 4:24).