What was learned was how to make oneself indispensable to these powers, and so to put oneself in a position to ask, or even to require, their intercession in the course of events or their abstention from interference in any given enterprise.
Propitiation was the end, and this end was sought, in great part, by acquiring facility in subservience. It appears to have been only gradually that other elements than those of efficient service of the master found their way into the stock of priestly or shamanistic instruction.
The priestly servitor of the inscrutable powers that move in the external world came to stand in the position of a mediator between these powers and the common run of unrestricted humanity; for he was possessed of a knowledge of the supernatural etiquette which would admit him into the presence. And as commonly happens with mediators between the vulgar and their masters, whether the masters be natural or preternatural, he found it expedient to have the means at hand tangibly to impress upon the vulgar the fact that these inscrutable powers would do what he might ask of them. Hence, presently, a knowledge of certain natural processes which could be turned to account for spectacular effect, together with some sleight of hand, came to be an integral part of priestly lore. Knowledge of this kind passes for knowledge of the "unknowable", and it owes its serviceability for the sacerdotal purpose to its recondite character. It appears to have been from this source that learning, as an institution, arose, and its differentiation from this its parent stock of magic ritual and shamanistic fraud has been slow and tedious, and is scarcely yet complete even in the most advanced of the higher seminaries of learning.
The recondite element in learning is still, as it has been in all ages, a very attractive and effective element for the purpose of impressing, or even imposing upon, the unlearned; and the standing of the savant in the mind of the altogether unlettered is in great measure rated in terms of intimacy with the occult forces. So, for instance, as a typical case, even so late as the middle of this century, the Norwegian peasants have instinctively formulated their sense of the superior erudition of such doctors of divinity as Luther, Malanchthon, Peder Dass, and even so late a scholar in divinity as Grundtvig, in terms of the Black Art. These, together with a very comprehensive list of minor celebrities, both living and dead, have been reputed masters in all magical arts; and a high position in the ecclesiastical personnel has carried with it, in the apprehension of these good people, an implication of profound familiarity with magical practice and the occult sciences. There is a parallel fact nearer home, similarly going to show the close relationship, in popular apprehension, between erudition and the unknowable; and it will at the same time serve to illustrate, in somewhat coarse outline, the bent which leisure-class life gives to the cognitive interest. While the belief is by no means confined to the leisure class, that class today comprises a disproportionately large number of believers in occult sciences of all kinds and shades. By those whose habits of thought are not shaped by contact with modern industry, the knowledge of the unknowable is still felt to the ultimate if not the only true knowledge.