The Language of the World

Since we're born, we answer to any feeling, to any stimulus, to everything. Think about crying when babies are hungry or about an smile when they're given a present. We do not need think to act and that's the first principle to consider a language. Athought comunicating is the main usage, language is also a tool to establish a social relationship with which we are able to make possible the society.
And like everything that exists (and also what does not exist)  human beings must study their language if they want to keep in their proper feature of curiosity.