Conditions necessary office space, quiet as necessary, please do not loud noise and no fixed destination string, not a long chat, personal phone calls, to the modern time, efficiency and better reflect the concept here.
ASundayschoolteacheraskedherchildrenas they were onthewayto a church service, "Why is it necessarytobe quietinchurch?" One brightlittlegirl replied, "Becausepeoplearesleeping."