If you pull up to a stop sign with no words on it, you instantly recognize
it as a STOP sign. Ever notice that Masonic rings have only a symbol
and yet you recognize it immediately? Stop lights use colors to instantly
convey their message. No words needed in these particular instances.
Point is that we all use symbols and signs every day in our lives and
have since we began learning. Symbols deliver the message quickly.
Symbols and pictures are the oldest communication techniques known
to mankind. It is easily the oldest way of teaching and it works.