Soul Not Naturally Immortal: How do those that hold the view that the soul is naturally immortal defend it, in light of the necessity of eating from the Tree of Life in order to sustanin life? [I Timothy 6:16, Romans 2:7, I John 5:12, John 3:16, Genesis 2:16]. Adam & Eve's Diet: What if Adam & Eve had just sustained themselves from the other trees, instead of eating from either the "Tree of Life" or the "Tree of Knowledge"?