cept s ▁cannot ▁be ▁" bl otted ▁out ", ▁the ▁secondary ▁pre cept s ▁can ▁be . ▁Therefore , ▁for ▁a ▁de ont ological ▁eth ical ▁theory ▁they ▁are ▁open ▁to ▁a ▁surprising ly ▁large ▁amount ▁of ▁interpretation ▁and ▁flex ibility . ▁Any ▁rule ▁that ▁helps ▁human ity ▁to ▁live ▁up ▁to ▁the ▁primary ▁or ▁subs idi ary ▁pre cept s ▁can ▁be ▁a ▁secondary ▁pre cept , ▁for ▁example : ▁ ▁D run ken ness ▁is ▁wrong ▁because ▁it ▁inj ures ▁one ' s ▁health , ▁and ▁worse , ▁dest ro ys ▁one ' s ▁ability ▁to ▁reason , ▁which ▁is ▁fundamental ▁to ▁humans ▁as ▁rational ▁animals ▁( i . e ., ▁does ▁not ▁support ▁self - pres ervation ). ▁ ▁The ft ▁is ▁wrong ▁because ▁it ▁dest ro ys ▁social ▁relations , ▁and ▁humans ▁are ▁by ▁nature ▁social ▁animals ▁( i . e ., ▁does ▁not ▁support ▁the ▁subs idi ary ▁pre cept ▁of ▁living ▁in ▁society ). ▁ ▁Natural ▁moral ▁law ▁is ▁concerned ▁with ▁both ▁exterior ▁and ▁interior ▁acts , ▁also ▁known ▁as ▁action ▁and ▁mot ive . ▁Sim ply ▁doing ▁the ▁right ▁thing ▁is ▁not ▁enough ; ▁to ▁be ▁truly ▁moral ▁one ' s ▁mot ive ▁must ▁be ▁right ▁as ▁well . ▁For ▁example , ▁helping ▁an ▁old ▁lady ▁across ▁the ▁road ▁( good ▁exterior ▁act ) ▁to ▁impress ▁someone ▁( bad ▁interior ▁act ) ▁is ▁wrong . ▁However , ▁good ▁intent ions ▁don ' t ▁always ▁lead ▁to ▁good ▁actions . ▁The ▁mot ive ▁must ▁co inci de