 The Shasekishū , a book of Buddhist parables from the Kamakura period , makes a point of distinguishing between good and bad tengu . The book explains that the former are in command of the latter and are the protectors , not opponents , of Buddhism - although the flaw of pride or ambition has caused them to fall onto the demon road , they remain the same basically good , dharma @-@ abiding persons they were in life . 
