distinction made by Philip Wheelwright,22 Perrin observed that there are certain symbols that always have a one-to-one relationship to the things they represent (e.g., the mathematical symbol pi or a red signal light at an intersection).23 These are steno-symbols; they are useful precisely because they have a single, clearly defined, and clearly understood meaning. Quite different are those symbols which can conjure up in our minds and hearts a whole range of meanings, experiences, or yearnings.