So these four requisites will keep human beings living in the middle way. But it is not sufficient just to live using the four requisites. People need to understand them and to put them into practice, which means living with understanding; which is what is meant by living in the middle way. That people need the four requisites is irrefutable as we all have to eat to stay alive; wear clothes to keep warm, or be civilized; live in accommodation to protect ourselves from the dangers of both animals and the weather and we all need to take care of ourselves both physically and mentally.