The human spirit exists as a part of God.  Since all that exists is of God, and our spirits are themselves parts of the Divine order that they cannot exist apart from God in their natural state.  Thus human spirit themselves exist as parts of God's Spirit or the Holy Spirit.  Each is like a thread or threads of a tapestry, or notes of a vast score.  So then it is impossible for a human spirit to exist at all independently of God.  How is it then that humans become corrupt, if they cannot exist apart from God?  Nothing is corrupted; corruption in the idea of something good somehow becoming something evil is impossible, for evil itself does not exist, it is but a lack of good.  Each soul reflects different attributes of God's nature, just as different people do the same.  Though God's nature is singular though composed of many complex parts, a unity of harmony, certain elements can be brought together into interlocking patterns which can exist independently to some extent, or moreso than others; they are directly concerned with each others, as a part of a picture i.e. a picture of a certain person is certainly a whole person in the painting though only a part of the painting.  Individual souls are like collections of elements that compliment each other; imagine that the Spirit of God is like the periodic table of the elements, except that all of the elements work together in harmony to create one whole.  But of course they can also form different compounds.  This is similar to the human soul, it is like a compound.  God is all things, and the human soul is a piece of certain parts of the whole that work together in a certain harmony by themselves, though contributing absolutely to the whole.  Corruption thus occurs when part is taken away so that the other parts cannot contribute to the whole as they were created to contribute.  It lacks a vital link; indeed all links are vital.  It is like taking out the note from a particular harmonic line.  The human soul then is not as it was created.  Nothing was separated from God, but rather the human being lost a particular attribute to itself that is rooted in God; the human is no longer whole.  But the human still has the same soul and body most likely, its spirit however is lacking, and thus its soul and body have been separated from God.  Perhaps then humans can exist independently of God in soul and body, though this is not entirely possible.  Perhaps the person does not exist independently of all, but all is One and thus the soul and body are composed of God due to pantheistic monism; all is God.  But the human is no longer whole, though God is still whole.  This also explains marriage in part; two persons whose harmonies complement each other particularly well are brought together to as one, or rather they always were one in the Spirit of God but not in the realities of soul and body.