It is also supposed that a language was taught by some mythological god to the first pair. But we now know, if we know anything, that language is a growth; that every word had to be created by man, and that back of every word is some want, some wish, some necessity of the body or mind, and also a genius to embody that want or that wish, to express that thought in some sound that we call a word.
At first, the probability is that men uttered sounds of fear, of content, of anger, or happiness. And the probability is that the first sounds or cries expressed such feelings, and these sounds were nouns, adjectives, and verbs.
After a time, man began to give his ideas to others by crude pictures, drawings of animals and trees and the various other things with which he could give crude thoughts. At first he would make a picture of the whole animal. Afterward some part of the animal would stand for the whole, and in some of the old picture-writings the curve of the nostril of a horse stands for the animal. This was the shorthand of picture-writing. But it was a long journey to where marks would stand, not for pictures, but for sounds. And then think of the distance still to the alphabet. Then to writing, so that marks took entirely the place of pictures. Then the invention of movable type, and then the press, making it possible to save the wealth of the brain; making it possible for a man to leave not simply his property to his fellow-man, not houses and lands and dollars, but his ideas, his thoughts, his theories, his dreams, the poetry and pathos of his soul. Now each generation is heir to all the past.
If we had free thought, then we could collect the wealth of the intellectual world. In the physical world, springs make the creeks and brooks, and they the rivers, and the rivers empty into the great sea. So each brain should add to the sum of human knowledge. If we deny freedom of thought, the springs cease to gurgle, the rivers to run, and the great ocean of knowledge becomes a desert of barren, ignorant sand.