What was, "the spirit," of the Son, that the Son commended into the hands of the Father? What did the Son mean in stating, "into thy hands I commend the spirit of me? What did the Father do with the spirit of the Son while the spirit of the Son was in his hands?
His human spirit - He was also fully man and it is obvious you have no clue concerning the true nature of man as you interpret his nature only on a biological level no different than animals forgetting that he is made in the "invisible" image of God who is spirit.
2:7 καὶ ἔπλασεν ὁ θεὸς τὸν ἄνθρωπον χοῦν ἀπὸ τῆς γῆς καὶ ἐνεφύσησεν εἰς τὸ πρόσωπον αὐτοῦ πνοὴν ζωῆς καὶ ἐγένετο ὁ ἄνθρωπος εἰς ψυχὴν ζῶσαν LXX Gen 2:7
12:7 καὶ ἐπιστρέψῃ ὁ χοῦς ἐπὶ τὴν γῆν ὡς ἦν καὶ τὸ πνεῦμα ἐπιστρέψῃ πρὸς τὸν θεόν ὃς ἔδωκεν αὐτό LXX Ecc 12:7
The Son, Jesus was dead, separated from the Father who then had, in his hands, the spirit of the Son that put in the blood of the Son the soul, living, of the flesh. Jesus had poured our his soul unto death when he commended the spirit of him unto the hands of the Father.
Darby Lev 17:11 for the soul of the flesh is in the blood; and I have given it to you upon the altar to make atonement for your souls, for it is the blood that maketh atonement for the soul.
First, you are quoting the Greek Septuagent instead of the original Hebrew text. The Hebrew text uses the plural ("lives")in Genesis 2:7 not the singular. Man is not an animal, he is more than mere biological life. As with animals, his biological life is in the blood and therefore to shed his blood in the Biblical sense means to take away his biological life - to die. However, the "soul" of man represents a plurality of lives that include more than mere biological life.
The term "soul" also includes pyschological life and its manifestations. This is how Jesus defines works. The pychological life of man includes the inward activities of man's intellect and affections which are then made manifest externally by the will of man in words and actions. So there is the inward pyschological life and its outward expressions and that is the substance of what the Bible calls either good or bad works which have their source with the heart.
The term "soul" also gives expression to the spiritual life of man. Man is a triune being composed of spirit, soul and body, and in the fall, the spirit of man was separated from God and that separation was expressed through the pyschological life (soul) of man. Adam was created "upright" because Adam was created in spiritual union with God. God is life, light and holiness and when that is the source of man's spiritual life, light and holiness when he was created. The very instant his pyschological life (soul) sinned, man was spiritually separated from God who is life, light and holiness and thus in that very instant he spiritually died (separated from God), and that spiritual death was expressed in his pyschological life (soul) cast into spiritual darkness and spiritually depravity, which in turn originated the progressive principle of corruption in his biological life form thus eventually resulting in separation of his material from his immaterial life forms - physical death 930 years later.
Thus the moral "image" God was lost in the fall and it was lost in the area of man's spirit and that is why it is the "spirit" of man that must be born of the Spirit (jn. 3:6). By new birth the spirit of man is brought back into spiritual union with God, and that spiritual life is made manifest in the pyschological life of man by inclining the will of man toward righteousness. As God works in the spirit of man through the pyschological life of man (mind, affections) to enlighten, empower, and impart righeousness into the external life of man (Eph. 4:24; Col. 3:10).
It is sown a natural body; it is raised a spiritual body. There is a natural body, and there is a spiritual body. And so it is written, The first man Adam was made a living soul; the last Adam was made a quickening spirit. Howbeit that was not first which is spiritual, but that which is natural; and afterward that which is spiritual. 1 Cor 15:44-46
Adam was created a "living soul" whose physical body was sustained by biological life and when biological life ceased, the body returned to dust. Adam was created a "living soul" because the pychological life of Adam was the control center within that biological sustained body. Adam was controlled by his soul - self control.
The body of the Second Adam was free from the corruptive indwelling principle of sin.He said that no man could take his life. For him to suffer biological death, he would have to willing depart from his body. The proof that his body did not possess the indwelling corruptive principle of sin is that while it was in the grave it saw NO CORRUPTION. When His body was raised from the grave in its incorruptible state, it was made alive by the Spirit to suffer biological death no more. Our bodies corrupt in the grave as they turn back into dust, but when our bodies are quickened by the Spirit they will be raised like unto Christ's body - incorrptible and no longer subject to biological death nor under self-control (soul guided) but the control center in the resurrected glorified man will be in the spirit of man where union with God occurs, and thus directly under the control of the inward new man empowered by the Spirit of God. Here and now, we are to "walk in the Spirit" but many times fail. In the new resurrected body there will be not only no indwelling sin and therefore no indwelling principle of biological corruption, but the control center in man will no longer be soul centered but spirit centered as we will always "walk IN THE SPIRIT."