The deliberate modesty in hiding the author ' s name is subverted by providing hints as to its origin by references to the date and the source texts of Chih － yen . However , this has been the prime cause for confusion over the authorship . Yao Ch ' ang － shou thinks that the use of the words “ record " 記 and “ compile " 集 rather than “ write " 著 , and the final words , “ the Dharma － realm diagram elucidated " 法界 圖章 , indicates that the “ seal text " was recorded and the commentary “ compiled " as an “ elucidation ". This Yao considers is an indication that Chih － yen wrote the “ seal " and Ûisang the “ commentary ". However , the word “ compile " could refer to the gathering 集 together of the unburnt fragments referred to in Ch ' oe Ch ' iwôn ' s story , and the word “ record " to Ûisang ' s writing down one of the three secret instructions 秘 訣 provided by his dream visitor dressed in blue . Further , the t ' u － chang 圖章 is synonymous with the word “ seal ", and thus provides no substantial clues . However , the date is just about three months before Chih － yen ' s death , and as his other chief disciple , Fa － tsang , was yet to be ordained as a monk , the conclusion astute readers would have drawn , at least in Korea where the text was well known , was that Ûisang was the author .