introduction to the metaphysic of morals-µÚ2½Ú
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¡¡¡¡¡¡¡¡¡¡II¡£¡¡THE¡¡IDEA¡¡AND¡¡NECESSITY¡¡OF¡¡A¡¡METAPHYSIC¡¡OF¡¡MORALS¡£
¡¡¡¡It¡¡has¡¡been¡¡shown¡¡in¡¡The¡¡Metaphysical¡¡Principles¡¡of¡¡the¡¡Science¡¡of
Nature¡¡that¡¡there¡¡must¡¡be¡¡principles¡¡a¡¡priori¡¡for¡¡the¡¡natural
science¡¡that¡¡has¡¡to¡¡deal¡¡with¡¡the¡¡objects¡¡of¡¡the¡¡external¡¡senses¡£
And¡¡it¡¡was¡¡further¡¡shown¡¡that¡¡it¡¡is¡¡possible£»¡¡and¡¡even¡¡necessary£»¡¡to
formulate¡¡a¡¡system¡¡of¡¡these¡¡principles¡¡under¡¡the¡¡name¡¡of¡¡a
¡¨metaphysical¡¡science¡¡of¡¡nature£»¡¨¡¡as¡¡a¡¡preliminary¡¡to¡¡experimental
physics¡¡regarded¡¡as¡¡natural¡¡science¡¡applied¡¡to¡¡particular¡¡objects¡¡of
experience¡£¡¡But¡¡this¡¡latter¡¡science£»¡¡if¡¡care¡¡be¡¡taken¡¡to¡¡keep¡¡its
generalizations¡¡free¡¡from¡¡error£»¡¡may¡¡accept¡¡many¡¡propositions¡¡as
universal¡¡on¡¡the¡¡evidence¡¡of¡¡experience£»¡¡although¡¡if¡¡the¡¡term
¡¨universal¡¨¡¡be¡¡taken¡¡in¡¡its¡¡strict¡¡sense£»¡¡these¡¡would¡¡necessarily¡¡have
to¡¡be¡¡deduced¡¡by¡¡the¡¡metaphysical¡¡science¡¡from¡¡principles¡¡a¡¡priori¡£
Thus¡¡Newton¡¡accepted¡¡the¡¡principle¡¡of¡¡the¡¡equ