Torah, Deuteronomy 9:20 – 9:21: And with Aaron, the Lord was very furious, to destroy him; so I prayed also for Aaron at that time. And I took your sin the calf, which you had made, and I burned it with fire, and I crushed it, grinding it well, until it was fine dust, and I cast its dust into the brook that descends from the mountain.
When Moses climbed Mount Sinai,his faithful assistant Aaron had to descend to the valley because people were complaining and shouting, “Where is this Moses? Make him come down to us and give us something to pray to. Or give us back the Egyptian idol,” meaning gold, fulfillment of our egoism.
We can’t live in an empty egoism, it demands fulfillment. Enormous empty desires arise in us, and we want to fulfill them. But with what? How? With either altruistic or egoistic pursuits, but it is necessary for our egoism, it can’t live without this and it screams about this. Since egoism, embodied in the golden calf can somehow fill the people, Aaron agrees to it.
Of course, the Creator does all this. After all, there is none else besides Him. But why does He do this? He does it, so that people, while outside of Egypt, would dive into the same huge Egyptian desires and revive egoism in themselves for subsequent correction.
Obviously, nothing happens without the will of the Creator. We can only accelerate the time of our ripening. But such falls as results of destruction of the First and the Second Temple and the exile were registered in Kabbalah in advance, and Kabbalists knew about them.
It is impossible to reach full correction and adhesion with the Creator without going through these states.
From KabTV’s “Secrets of the Eternal Book” 5/11/16