Gospel of Thomas
18. The disciples said to Jesus, "Tell us, how will our end come?"
Jesus said, "Have you found the beginning, then, that you are looking for the end? You see, the end will be where the beginning is.
Congratulations to the one who stands at the beginning: that one will know the end and will not taste death."
I think the Creation myths both Genesis and the Gnostic Creation myth are very important tools since they help us figure out "who we are" and "where we are going".
And here's my ramble...
The classic Jewish interpretation of the fruit of the KoGaE is that when mankind partook of the fruit, he became morally responsible for his actions since now mankind gained an innate sense of right and wrong. Since mankind knew what was right and wrong, they had no reason to stay in the garden anymore. It's unknown as to why Adam and Eve would want to leave YHVH and, a 1000 Rabbis will give different 1001 answers to this one.
The Gnostic take on this is that when the "glitch" of creation started seeds of God basically got "stuck" here. When Yaldaboath first saw one of the Aeons that was above him, he quickly and ignorantly tried to make an effigy of it so he could trap that First Man, Adamas. The Aeons saw right through his plan but allowed Adamas to willingly enter into the forgetfulness in order to show Yaldaboath up.
To summarize, Yaldaboath makes a "toy" of one of his superiors so he can torture, control, and make it serve and worship him. His superiors are already 5 steps ahead of him decide to bring his toy to life. This now living "toy" doesn't know that he is anything more than a toy. The superiors left a few other "toys" they called Zoe and her child "the instructor". This Zoe doll was not just a toy though but she was a miniature version of Sophia. Yaldaboth and his crew are troubled by this toy they didn't create and decide to defile it in a way to make it theirs. Zoe separates herself from the toy leaving a Eve, while Zoe goes and hides in the Tree of the KoGaE.
Thinking that they made Zoe theirs they gave "Eve" to "Adam", telling him that she is his servant. Now "the instructor" who Yaldaboath and his crew called "the Beast" and "the serpent", recognized Eve as Zoe and when she didn't recognize him, he instructed her to eat of the Fruit and share it with Adam. Upon doing so, they saw that paradise they were given was never a paradise at all. They became aware that they were estranged in a foreign land but because of the fruit, they knew that they had a home somewhere and they would eventually find a way back home.