▁science ▁of ▁religion , ▁Das an ' s ▁theory ▁rel ates ▁cogn ition ▁with ▁intent ional ▁p iety ▁in ▁the ▁cogn itive ▁process , ▁and ▁comb ines ▁intent ional ▁p iety ▁and ▁rever ence / pur ification ▁in ▁rit ual ▁practice . ▁Das an ▁intended ▁to ▁reg ulate ▁the ▁excess ive ▁rit ual ▁practices ▁of ▁the ▁liter ati ▁and ▁restrict ▁popular ▁lic ent ious ▁cult s ▁( 음 사 , ▁ <0xE6> <0xB7> <0xAB> <0xE7> <0xA5> <0x80> ) ▁in ▁accord ance ▁with ▁his ▁cogn itive ▁formula . ▁From ▁his ▁point ▁of ▁view , ▁Conf u cian ist ' s ▁rit ual ▁conception s ▁were ▁impro per ▁or ▁imp ract ical , ▁and ▁popular ▁lic ent ious ▁cult s ▁were ▁im pi ous ▁and ▁over ly ▁enthus i astic . ▁In ▁order ▁to ▁solve ▁these ▁problems , ▁He ▁re defined ▁Z hi ▁H si ' s ▁concept ▁of ▁serious ness ▁as ▁att ent ive ▁concentration ▁of ▁conver gent ▁p iety ▁into ▁the ▁concept ▁of ▁pr ud ential ▁rever ence ▁as ▁intent ional ▁p iet ism . ▁Z hi ▁H si ' s ▁concept ▁of ▁serious ness ▁contains ▁ap oph atic ▁myst ic ism ▁like ▁Z en ▁Buddh ist ▁Qu iet ism ▁( 정 , ▁ <0xE9> <0x9D> <0x9C> ) ▁by ▁med iation , ▁but ▁Das an ' s ▁concept ▁of ▁rever ence ▁is ▁incl ined ▁towards ▁Cat aph atic ▁activ ism ▁by ▁cont empl ation . ▁ ▁Land ▁reform ▁Land ▁reform ▁was ▁an ▁important ▁issue ▁for ▁the ▁Sil h ak ▁reform ers , ▁and