source
[http://oll.libertyfund.org/?option=com_staticxt&staticfile=show.php%3Ftitle=1443&chapter=56215&layout=html&Itemid=27 Immanuel Kant, The Metaphysics of Ethics by Immanuel Kant, trans. J.W. Semple, ed. with Iintroduction by Rev. Henry Calderwood (Edinburgh