The wisdom of Kabbalah is called a hidden wisdom because only people who use it correctly can disclose it.
What does it mean to use the wisdom of Kabbalah “correctly”? It means that its practitioners construct a system of connection among each other in which they reveal the teaching.
It is a teaching that does not come from our own minds. It is written in several places that the wisdom of Kabbalah has no need for intellectually smart people. Instead, it needs people who work on their hearts, i.e., people who calibrate their desires such that they influence each other. By doing so, they influence the system of connection that exists between them, and they accordingly receive a special influence called “the Creator”—the upper force of love and bestowal that illuminates within the system of connection that they construct.