In plain words
There is one more thing students must especially learn. That is cleanliness. It is of two kinds. One is outer cleanliness, the second inner cleanliness. If either of these is lacking, that person is good for nothing. The clothes worn on the body, the books one studies and one's surroundings: all these are called outer cleanliness. That is, in the way of the world, one must keep clean every object that concerns our daily life. Cleanliness must be kept in everything, from teeth and eyes to food and carts. Health comes of this. If one does not scrub the body and bathe every day, dirt gathers on the body and itching may begin. Some sores may break out. These may turn into contagious diseases. Our circumstances may be poor. We may have only one or two sets of clothes. Even those must be kept clean. We must see that no dirt gathers on them. In the same way, the books we read every day must not be thrown just anywhere. Needless lines must not be drawn in them. Nor must anything be written in them. Even paper must be kept clean. Their cleanliness must be such that everyone praises it. One must not let a bad smell gather. One must become worthy of the Prema of all. One must sweep the surroundings where one lives and keep one's own room clean oneself. Indecent pictures must not be hung in the room. One must put up in one's room only pictures that offer an ideal and noble feelings.