Main Kabbalistic Sources: The Works of the ARI
And the same words that were said about the Rashbi should be said about the ARI himself—that his predecessors [even though they knew more than the ARI] were not given permission from Above to disclose the interpretations of the wisdom, and that he was given this permission. And also, this does not distinguish any greatness or smallness at all, since it is possible that the virtue of his formers was much greater than the Ari’s, but they were not given permission for it at all. For this reason, they refrained from writing commentaries that relate to the actual wisdom, but settled for brief intimations that were not in any way linked to one another.
For this reason, since the books of the Ari appeared in the world, all who study the wisdom of Kabbalah have left their hands from all the books of the Ramak, and all the first and the great ones [Kabbalists] that preceded the ARI, as it is known among those who engage in this wisdom. They have attached their spiritual lives solely to the writings of the ARI in a way that the essential books, considered proper interpretations of this wisdom, are only The Book of Zohar, the Tikkunim [Tikkunei Zohar] and following them, the books of the ARI.