The main purpose of this essay is to show that natural language, when contextualised, by its nature avoids the paradoxes and the shortcomings ascribed to it. Preliminarily, I would like to put forward some hypotheses on the origin of language based on hypotheses inferred, in my opinion, in the writings of the American linguist, Noam Chomsky, and the American philosopher, Jerry Fodor. I also propose a simple, naturalist hypothesis on the origin of natural numbers and therefore of arithmetic.