expecting these great truths to be clear to their clotted minds, cannot
even be brought to believe a house-fly has 25,000 eyes, constructed each
on the plan of our own? They will hardly believe an unseen force flows
through the magnetic needle, turning it to the north. If they had
refused, with the same logic, to believe that A was A when they had to
so believe in order to learn at all, they would now be groping in that
stupid illiteracy, which, by a parity of reasoning, they so richly
deserve.