The fall of Man was a consequence of the extension of God’s essence (spirit or breath) into the Creation, which led to knowledge of good and evil and of death.
Simply put, the shift was from eternal, “nondual” (enlightened) God-consciousness to temporal (even if “immortal”), particular, Yahweh-consciousness, of the personal God that is the bridge between the Most High God (what the Gnostics called “the Fore-father”) and Man.
The transition was also marked by a movement from omniscience to something less than that, because only in eternity (which is a no-time state) can everything be known. So with it came God’s first experience of not-knowing, of entering the unknown; and with that, the possibility of doubt: what will happen next?