Until the destruction of the Second Temple, the wisdom of Kabbalah was the Torah, the study of the Israeli nation, the group that Abraham brought out of Babel and made into a nation that lives according to the laws of the wisdom of Kabbalah. The destruction of the Temple means that they fell from love thy friend as thyself into unfounded hatred.
Since then the wisdom of Kabbalah ceased to exist among the people who we still call the people of Israel, although they were no longer connected to the law of love thy friend as thyself, and therefore have no right to be called “Israel” (Yashar – Kel), which means “straight to the Creator.” So the understanding of what we need the wisdom of Kabbalah for was lost. Baal HaSualm speaks about his fear, “and it is fearful that it will be forgotten, God forbid, in the people of Israel.”
He is afraid of that, but others don’t even think about it since they don’t know what the wisdom of Kabbalah is needed for. And to that end, Baal HaSulam wrote the “Introduction to TES,” in order to explain why it is obligatory to study the book “The Study of the Ten Sefirot“ (TES) and the wisdom of Kabbalah in general.
He didn’t see that people were interested in this wisdom or that they respond to his appeal, that they even listened to how important and essential this wisdom is. Everyone rejected it by finding different excuses. Religious people who studied the Torah didn’t understand why they needed something else. And a person who lived an ordinary corporeal life was afraid that the wisdom of Kabbalah would ruin his life. Who knew what forces were hidden in it, what he would summon upon himself by mentioning the Holy names, perhaps he would summon troubles by that…
Others justified themselves by saying that there were people who studied Kabbalah, who called themselves Kabbalists, but who didn’t recommend it to others. There are many reasons why the wisdom of Kabbalah was pushed aside, away from general attention, and it is a wonder that it has existed until now. After all there were many wisdoms that were forgotten and have disappeared throughout history.
People reject this study, but Baal HaSulam thought that this should stop. The time had come for mankind to change our attitude and to show people why the wisdom of Kabbalah is necessary and why it came into the world—in order to raise humanity to the level of unity with the Creator, which is the goal of our life, the goal of creation. It is time to fulfill this goal here and now.
For this reason Baal HaSulam wrote TES and “The Introduction to TES” in which he explains the importance of its study. In his time it was very hard to bring this idea to people. Today it is accepted in a totally different manner, and we can openly advertise the widespread study of the wisdom of Kabbalah. I remember what a buzz it made in Bnei Brak, an orthodox town, when people found out that I brought a group of nonreligious students from Tel Aviv to my teacher, Rabash. Rabash made a real revolution, but there was no other choice, the world is in such a state that the wisdom of Kabbalah has to be revealed.
From the 1st part of the Daily Kabbalah Lesson 11/11/12, “Introduction to the Study of the Ten Sefirot