The Mole and His Mother

A MOLE¹, a creature blind from birth, once said to his Mother:  "I
am sure than I can see, Mother!"  In the desire to prove to him
his mistake, his Mother placed before him a few grains of
frankincense, and asked, "What is it?'  The young Mole said, "It
is a pebble²."  His Mother exclaimed:  "My son, I am afraid that you
are not only blind, but that you have lost your sense of smell.