Words block up our Path.—Wherever primitive men put down a word, they thought they had made a discovery. How different the case really was!—they had come upon a problem, and, while they thought they had solved it, they had in reality placed an obstacle in the way of its solution. Now, with every new piece of knowledge, we stumble over petrified words and mummified conceptions, and would rather break a leg than a word in doing so.