The spark of Infinity must be expressed in everything. Each concept must include presupposition of its development into Infinity. There may be noted whole series of concepts which succeed each other. Neither friendship nor cooperation can be terminal. Between them and the Subtle World there must be still another something that can equally belong to the two worlds. This something is called Brotherhood.
No greater concept can be named, none which could so crown human relations and correspond to the essential nature of the Subtle and Fiery Worlds. Therefore the Brotherhood is called threefold. It extends between the three worlds as a firm bridge. It is almost impossible to imagine the contact of the earthly with the Fiery World, but under the panoply of Brotherhood such confluence is made possible. (BR (opens in new tab), 8)