Interesting article. There is clearly a covenant between God and Adam (covenant of works) and after the fall (covenant of grace). I think the author does a much better job of articulating it then I ever could.
I dont wish to take liberties with the scriptures but it struck me even before I got to the end of the article how much the fruit of the Tree of Life was mildly similar to the Lords Supper. Neither the fruit from the tree nor the bread and wine would save you but it is an obedient calling-one not to partake, the other to partake. I was surprised at the end of the article to see the author talk about the Lords Supper and mentioned:
But this sacrament testifies that God rescued us, restored us and made us new.
Just the opposite of what the fruit from the Tree of Life did with Adam.