The Wisdom of Kabbalah and Philosophy
Sages of Kabbalah observe philosophic theology and complain that they have stolen the upper shell [external general concepts] of their wisdom, which Plato and his Greek predecessors had acquired [adopted and modified through human egoistic intellect] while [superficially, without delving into the essence] studying with the disciples of the prophets in Israel.
They have stolen basic elements from the wisdom of Israel [as later on other religions have stolen major principles of Kabbalah] and wore a cloak that is not their own [religions dressed their commandments and properties into external prayers, customs, and traditions.]. To this day, philosophic theology sits on the throne of Kabbalah, being hair under her mistress [authentic universal wisdom].…
Kabbalah cannot prove its [superior] nature and truthfulness, and no revelations will suffice for the world to know it before the futility and falsehood of theological philosophy that has taken its throne becomes apparent [to the world]. [Because it is only through clarification of delusions of philosophical theology which are opposite to Kabbalah that humanity will get a chance to attain the essence of Kabbalah].
Therefore, there was no such salvation for Israel [meaning those who aspire to the Creator, Israel = “Isra-El” – straight to the Creator], as when the materialistic psychology [based solely on experience and scientific realistic research rather than conjectures] appeared and struck [with its sensible clarifications and facts] theological philosophy on its [invalid and imaginary] head a lethal blow.
-Baal HaSulam, “The Wisdom of Kabbalah and Philosophy”