Hi Funmilayo, too much these days. People who go out to destroy others, reputation for example, or their homes, who cannot control anger might start with being undisciplined and get out of hand and people might get hurt physicalyl and of course mentally too. Its good to have discipline to achieve a goal, pass an exam, do studies, or you might never get the qualification you want. All human beings are different, and some people can stick to routines more easily, and others find it difficult to do so. Very creative people often ignore rules and so does everyone else,to a certain extent, or we might not be human. Like running across the road when the lights are just changing. So its a good question - hey and the most difficutl sense to control is the tongue - speech. Funnilayo, I hope my answer's useful.