In an era of peace, one needs to be "square", which means being strict and upright. In an era of turmoil, one needs to be "rounded", which means being flexible and tactful. When the state is rapidly declining, one needs to be both "square" and "round". In dealing with good people, one should be tolerant; in dealing with bad people, one should be strict. In dealing with people in general, one needs to be both tolerant and strict.