All the Teachings in the World Are Included in the Wisdom of Kabbalah
Since the whole of the wisdom of Kabbalah speaks of the revelation of the Creator [the reason for the Creator’s concealment], naturally, there is nothing more successful teaching for its task. [The whole of reality is the Creator. The present reality is His concealment. The only real action is revelation of Him.]
– Baal HaSulam, “The Teaching of the Kabbalah and Its Essence”
However, understanding the meaning of the word, “spirituality,” [sensed in the property of bestowal and love] has nothing to do with philosophy. This is because how can they discuss something that they have never seen or felt? [After all, they do not have a goal to be corrected and do not research the new reality in the corrected properties.] What do their rudiments [about the attainment of the Upper World, the Creator] stand on?
If there is any definition that can tell spiritual from corporeal, it belongs only to those who have attained a spiritual thing and felt it. These are [only] the genuine Kabbalists; [this is because they are the only ones who are engaged in self-correction and after that, they sense and research the Upper World according to their similarity to it] thus, it is the wisdom of Kabbalah that we need.
– Baal HaSulam, “The Wisdom of Kabbalah and Philosophy”