For, strange as the statement will appear at first sight, modern metaphysics, and to a large extent modern physical science, have been groping for ce… - Alfred Percy Sinnett

Theosophical literature, from the outset of the great movement it inaugurated, has been largely concerned with previously unknown laws governing the origin and destinies of humanity, the birth and progress of worlds, the coherent design of the Solar System, and, in short, with the interpretation, in the light of knowledge till recently reserved for a very few, of the stupendous Divine purpose underlying physical manifestation. My own earlier books, The Occult World and Esoteric Buddhism, forecast rather than embodied teaching along such lines, revealing the existence of those whom I called “ the Elder Brethren of Humanity,” who had risen above the level of generally current civilization, and thus had touch with the wisdom of the Divine Hierarchy.

The trials through which the neophyte has to pass are no fantastic mockeries, or mimicries of awful peril. Nor, do I take it, are they artificial barriers set up by the masters of occultism, to try the nerve of their pupils, as a riding-master might put up fences in his school. It is inherent in the nature of the science that has to be explored, that its revelations shall stagger the reason and try the most resolute courage. It is in his own interest that the candidate's character and fixity of purpose, and perhaps his physical and mental attributes, are tested and watched with infinite care and patience in the first instance, before he is allowed to take the final plunge into the sea of strange experiences through which he must swim with the strength of his own right arm, or perish. (Occultism and the Adepts I)

Men of science in former ages worked in secret, and instead of publishing their discoveries, taught them in secret to carefully selected pupils. Their motives for adopting that policy are readily intelligible, even if the merits of the policy may seem still open to discussion. At all events, their teaching has not been forgotten; it has been transmitted by secret initiation to men of our own time, and while its methods and its practical achievements remain secrets in their hands, it is open to any patient and earnest student of the question to satisfy himself that these methods are of supreme efficacy, and these achievements far more admirable than any yet standing to the credit of modern science. (Introduction)