“The decisive step beyond the other gnostic systems consists in the fixing of the number of these powers or aeons at ten, according to the ten sefiroth of the Book of Creation and the ten words of creation through which, according to the ancient Aggadah, God called the world into existence.
Once the number of these “qualities” or middoth of God was fixed they came to be associated with a large number of symbolic names, since each of the epithets by which God could be presented or named was necessarily related to one or another of the middoth. In the Bahir we can still recognize quite clearly the efforts that were made to introduce a more or less consistent terminology in the use of these symbols in relation to specific sefiroth, though it took some time until this process of the definitive crystallization of the symbolism of the old Kabbalah came to its final conclusion.
The different attempts often contradict one another. While the commentators of the Kabbalah strove to bring the symbols into accord or to unify them, the historian naturally has no interest in a harmonistic exegesis of this kind. We shall see several examples that suggest conflicting traditions that were simply juxtaposed in the Bahir. Here, too, the choice of symbols and appellations for this or that sefirah duplicates the process by which the Gnostics designated their aeons. They liked to adopt as names of aeons abstract terms such as thought, wisdom, penitence, truth, grace, greatness, silence, or images such as father, mother, abyss, etc.
These designations, some of which are identical with those found in the ancient documents while others were newly created in accordance with the methods of gnostic exegesis, fill the pages of the Bahir. There, however, they are derived from biblical verses or even the aggadic dicta of the rabbis.
Once again the question is posed: should we admit, at least for one of the strata of the book, the existence of vestiges of an ancient Jewish gnosis, of fragments that antedate the Middle Ages and in which anonymous Jewish Gnostics sought to express their mystical conception of the divinity without impairing their Jewish monotheism?
Or are we dealing with attempts by medieval men, who felt themselves newly stimulated for one reason or another, to view traditions that were intrinsically and purely Jewish from a gnostic perspective? Is our material essentially nothing but the well-known and straightforward Jewish tradition, the adaptation and transformation of which into symbols proves just how great was the psychological and temporal distance between these later authors and the period when the aggadic sayings originally crystallized?
This is the fundamental question that imposes itself upon the reader of the Bahir. It is a question that cannot be answered on the basis of general considerations; only a careful examination of the details can help us here. I do not hesitate, for my part, to affirm that the literature of the Spanish Kabbalah, especially that imbedded in the Zohar, clearly reveals a psychological attitude that, in the Middle Ages, led men to recast ancient talmudic and midrashic material according to an entirely new spirit by means of an exegetical and homiletical method that in its structure was gnostic, but that reached its full development only under the influence of the Bahir.”
Gershom Scholem, Origins of the Kabbalah, pp. 85-6.