Communication means that an idea which I have in my mind passes through my lips (or fingers, in most art forms) and reaches the other person's mind. Adequate communication means that when it reaches the recipient's mind, it is substantially the same as when it left mine. This does not mean that it will be completely the same, but that he will nevertheless have substantially realized the point I wish to convey. The words that we use are only a tool for translating the ideas which we wish to communicate.