“The higher dimension of religion has also always been practiced by a relatively few uncommon individuals. Indeed, it was largely the response to the more conventional or superficial aspects of such extraordinary personalities that produced the great cultic movements of exoteric religion among the masses. But such cultic movements are created by and designed for the instruction and social improvement of ordinary people, not men and women of the more highly evolved or awakened type. Therefore, alongside the development of exoteric religions there have always been secret societies and esoteric groups founded on practice of higher personal, moral, and biologically evolutionary disciplines.”

http://www.aboutadidam.org/relationship/secret.html