MORMONism is built on BELIEVEING the things that Joseph Smith claimed to be true. MORMONism is built on BELIEVEING the FEELINGS one gets when asking if the Book of MORMON is 'true' or not. If there is ANYTHING more substantial than this, I'm SURE that KitCat or one of our other MORMONs posting here can elaborate.
So belief in the ressurection is Joseph Smith's idea?