Great question, Peter, about what the lie was that Eve believed. As I think about it there are a number of ways the lie can be understood. The basic question seems be about obedience to God the creator. If God is indeed the creator not only of the universe but of the identity or soul of each individual, its seems obedience is owed. The specific command to not eat of the tree of the knowledge of good and evil may be rich in symbology and deep meaning, but in a sense almost anything could stand in for a direct command. The lie in this sense was the message of the temptor that happiness, fulfillment, true identity can be found in rejecting God's commands and therefore the authority of the creator over creation. If I want to look at this in a more secular sense, I would turn to Carl Jung's extra-biblical understanding of the purpose of creating humans and therefore what God wills for us (or commands). His idea is that God cannot truly experience creation outside the conscious reflection of human minds. So, disobedience in this view would be to say, no, I will not share with you, Creator God, my reflections on your creation--if that were possible. In short, the lie is that fulfillment is turning away from God rather than turning toward him and his way. I'mn curious your response to that explanation.