Dark Matters of the Soul
The Kabbalah of Shame.

Humanity's first sin, teaches Rab Tsakod HaKohen, was Adam and Eve's eating without the right intention. The Tree of Knowledge, says he, was not a tree or a food, or a thing at all. Rather it was a way of eating. Whenever a person takes self conscious pleasure from the world he falls, in that moment, from God consciousness, and eats from the Tree of Knowledge...

...Since our first sin was unholy eating only its opposite can fix it. All of life and all of history are training us for one end: to learn to "eat" in holiness, to not let the world's pleasures wrench our attention from God (even for an instant). The moment we get it the labor of this world will end...