The “secrets” (or arcane truths) imparted in this Degree are explained as consisting of certain peculiar marks or signs, intended to distinguish all Brethren of the elementary grade of Apprentice. Outwardly, in this and in subsequent Degrees also, they are expressed by step, sign, and word. These, of course, are not the full or real secrets, but only figurative emblems of them. It is what they signify that constitutes the secrets, and that significance is left for the Candidate to meditate upon and reduce into daily personal practice. Only so will he really learn them and come to understand why they are called “secrets” and why we insist upon their use. They can never be orally communicated, except in symbolic form, but must be learned by experimental practice.
W L Wilmshurst, The Ceremony of Initiation, Part II