Speaking is a breach in the breath. That is to say, when one speaks one has to take many more breaths than one would take otherwise. The breath is like the hoop a child plays with: according to the force of the blow of the stick, so many times the hoop turns; and when the force is spent the hoop falls down. It is also like the ticking of a watch. The watch goes for the time for which it is wound; it may be for twenty-four hours, or for one week, but longer than that period it cannot go, however far it is wound. Or compare it with a child's top; it turns so many times according to the strength with which it is spun, and when the force is spent the top falls over.