Hi ICANT,
The tree of life was not necessary until after the disobedience of the man formed from the dust of the earth.
This begs the question, why was the tree of life created in the first place? If it was not needed until after the disobedience, did God already know they would disobey, and thus made this tree as a solution? If it was a solution, why is it barred from Adam and Eve after they ate of the other? It would seem to be more of a taunting, to me. "You guys really messed up, and here's a way for you to live forever again, but you can't have it, nah nah nah."