Albert Mackey

“ Each is, in itself, independent, each expresses a single elementary idea.
But we now arrive at a higher division of masonic symbolism, which, passing beyond these tangible symbols, brings us to those which are of a more abstruse nature, and which, as being developed in a ceremonial form, controlled and directed by the ritual of the order, may be designated as the ritualistic symbolism of Freemasonry. ”