We have also sought to indicate the sources of our knowledge of it and the spirit in which we should approach it, we may now proceed to consider some of the principles or natural laws which have created or modified it. i. The first and simplest of all the principles of language, common also to the animals, is imitation. The lion roars, the wolf howls in the solitude of the forest: they are answered by similar cries heard from a distance. The bird, too, mimics the voice of man and makes answer to him.
