Human Life: Its Philosophy and Laws

action activity acute amount animal appear become begin blood body bowels called carried cause cells chronic cold constitution continued correct cure death destroy diet digestive disease drugs eating effects effort elimination employed energy essential exercise exist experience fact fever force frequently function germs give given greater habits healing heart human Hygiene impaired increased individual inflammation influence injury irritation keep kind less light living matter means medicine mental methods mind nature necessary never normal operations organs pain patient period physical physician poison possible practice present principle produce reason regard remedies removed repair rest restore says schools sick skin sleep stimulation stomach strength substances suffering supply symptoms taken theory things tissues treatment true usually vital whole