“In its initial stage of development in the circle of the Rabad, the doctrine of kawwanah differed in at least one important and instructive point from the form in which it was to become familiar to his successors. As soon as the kabbalists grasped the fundamental difference between the Emanator and the emanated, between the hidden God, subsequently to be called by them ‘en-sof, and the attributes or sefiroth by which he manifested himself and through which he acts, they immediately emphasized the thesis that there can be no kawwanoth addressed directly to ‘en-sof.
The nature of the hidden God excludes any such possibility. If we could meet him in kawwanah he would no longer be that hidden God, whose concealment and transcendence cannot be sufficiently emphasized. It would therefore only be logical for the kabbalists to argue that kawwanah could be related only to his middoth, the being and reality of which affect us, whereas kawwanah directed toward ‘en-sof is impossible.
When the kabbalists’ propaganda in favor of mystical prayer reached wider circles, this thesis, with its far from innocent implications, must have incensed a good number of people. In the circle of the Rabad, however, we still find kawwanoth directed without the least scruple toward the “Cause of causes,” which is but a philosophical expression for the Lord of the attributes and of the other causes that depend upon him.
We find here certain prayers directed to the Creator of the world, yoser bereshith, but also others in which the kawwanah is addressed directly to the Cause of causes. The difference between the latter and the Creator of the world has already been discussed previously. Kawwanoth of this kind had already disappeared by the time of Rabad’s son.
It is precisely this difference in the conception of the kawwanah that proves the genuineness of these traditions, which at least partially contradict the communis opinio of later generations. One may suppose that the doctrine of the kawwanah initially represented a sort of compromise between different tendencies.
Some of the oldest kabbalists still considered the direct orientation toward the Cause of causes to be possible, although the pleroma of middoth, potencies or forms whose nature was not yet speculatively defined, already absorbed their interest. Their gnostic way of seeing things likewise penetrated their prayer mysticism, without being able to overcome it entirely.
In sum, we can in fact say that this oldest Kabbalah was nourished by two sources: the elaboration of ancient traditional literary sources that served as a kind of raw material and the illuminations experienced by certain individuals for whom “at the beginning a door was opened to the science of the Kabbalah.”
These illuminations no longer occur, as in the time of the Merkabah mystics, by way of an ecstatic ascent to the divine Throne. The transmission of celestial mysteries concerning cosmogony and the Merkabah no longer takes place, either, in the ways indicated in the Hekhaloth literature.
The difference is considerable. Instead of rapture and ecstasy we now have meditation, absorption in oneself, and the pious, inward communion, debhequth, with the divine. The doctrine of the mystical kawwanah in prayer is about to supplant the doctrine of the ascent of the soul. The objective elements, so to speak, of the Hekhaloth literature (that is, the descriptions of the world of the Merkabah) serve as the foundation for a reinterpretation that conceives of everything that had existed there in terms of mystical symbols.”
Gershom Scholem, Origins of the Kabbalah, pp. 246-7.