XI. According to the preceding Principles, the Scheme of Duties of Virtue may be thus exhibited

       The Material Element of the Duty of Virtue


               1                              2
    Internal Duty of Virtue       External Virtue of Duty

        My Own End,                  The End of Others,
        which is also my             the promotion of
        Duty                         which is also my
                                     Duty

        (My own                      (The Happiness
        Perfection)                  of Others)

               3                              4
        The Law which is             The End which is
        also Spring                  also Spring

        On which the                 On which the
        Morality                     Legality

         of every free determination of will rests


    The Formal Element of the Duty of Virtue.