Baal HaSulam, “The Teaching of the Kabbalah and Its Essence”: “I am glad that I have been born in such a generation when it is permitted to disclose the wisdom of truth. And should you ask, “How do I know that it is permitted?” I will reply that I have been given permission to disclose. Until now, the ways by which it is possible to publicly engage and to fully explain each word have not been revealed to any sage…
And this is what the Creator has given me to the fullest extent. We deem it as dependent not on the greatness of the sage, but on the state of the generation, as our sages said, “Little Samuel was worthy, etc., but his generation was unworthy.” This is why I said that my being rewarded with the manner of disclosing the wisdom is because of my generation.”
Thus we can understand the historical events in which we were sometimes allowed to reveal the wisdom of Kabbalah as in the case of Moses, the prophets, the Great Assembly, Rabbi Shimon, and a chain of individual Kabbalists during the time of the exile until the days of the Ari, who was given permission to reveal it and accordingly reached the spiritual height he did. Besides, there were many Kabbalists who were not given such permission since the time they lived in was not right for the revelation. They performed corrections by themselves because they were in the upper system of bestowal, but they couldn’t publicize what they did.
In the meantime, the process advanced until the time of the Baal Shem Tov who publicized Kabbalistic messages by his actions and not by writing books. The point isn’t whether he wanted to or not, it has nothing to do with the desires of the Kabbalist. Each one performs the mission he was given.
Finally in the last century, Baal HaSulam also received permission to reveal the wisdom. We already live in a generation in which everyone is allowed to study the wisdom of Kabbalah; it is allowed to publicize it and to teach it to others. All the limitations have been removed, as Baal HaSulam tells us in the beginning of The Study of the Ten Sefirot. It is said that thanks to this wisdom the “children of Israel” will come out of exile.
From the 4th part of the Daily Kabbalah Lesson 11/27/13, Writings of Baal HaSulam