There are three principles to remember if you are to teach a human being anything, and they are consistency, consistency, consistency.They are such fragile creatures to begin with, with poor eyes, poorer hearing, and no sense of smell left to speak of, it's no wonder they are made of fear. Some centuries ago they moved inside and with that move went nine-tenths of their intuition. It is almost unmerciful to make them live so long when they spend their lives in so much pain.