It was believed that spoken words had some kind of influence on actual phenomena; that is, good things happened when good words were spoken, while ominous things happened when unlucky words were spoken.
声に出した言葉が現実の事象に対して何らかの影響を与えると信じられ、良い言葉を発すると良い事が起こり、概要な言葉を発すると凶事が起こるとされた。