God creates the world. He creates Adam and Eve. He places them in the Garden of Eden. He commands Adam not to eat from the Tree of Knowledge of Good and Evil. Thanks to the incitement of the serpent and the prompting of his wife, Eve, Adam eventually eats from the Tree. God confronts Adam, Eve and the serpent, pronounces their eternal punishments, including mortality, and banishes the human couple from the Garden, lest they eat from the Tree of Life and somehow achieve the immortality God had just pronounced that they had lost.
This raises the question as to why Adam and Eve didn’t eat from the Tree of Life in the first place. They had been warned that eating from the Tree of Knowledge carried a death sentence. Why not immediately eat from the Tree of Life after their crime and perhaps save their eternal existence?
The Bechor Shor on Genesis 3:22 explains the workings of the Tree of Life. It wasn’t that you partook of the fruit of the tree and it granted you eternal life from that moment forward. Rather, it was a tree of eternal healing. If one became sick, eating from the tree healed them. If one felt weak, the tree strengthened them. If one felt the onset of ageing, the tree would rejuvenate them. However, if one were healthy, strong, and young, it would have no effect.
Therefore, Adam and Eve must have known that in their young, strong and healthy state, eating from the Tree of Life would have no effect. That too is the reason God had to banish them from the Garden. If they would continue to live in the Garden, when they eventually did age or get sick, they would have a quick remedy within easy reach, thereby prolonging their lives forever.
Another interesting point is that the Sages state that the Tree of Life is none other than the Torah. The verse in Proverbs states that the Torah is “A Tree of Life to those who grasp it.” The Talmud expands on the healing properties of the Torah and gives a whole list of ailments that it can heal.
May we partake of our easily accessible Tree of Eternal Health, the Torah.
(Commentary based on the Bechor Shor)