Another ( story ) is according to the biography ( of Ûisang ) written by Ch ' oe Ch ' iwôn which writes : “ When Mr . Sang received Hua － yen at Master Yen ' s place , he dreamt of a divine man 神人 whose physique was very tall and robust . He said to Mr . Sang , ' You should write out what you yourself have been enlightened to , in order to grant it to people . ' He also dreamt that Sudhana gave him over ten pills of medicine for wisdom . He also met a blue － clothed youth 靑衣 童子 who gave him secret instructions 秘 訣 three times . When Master Yen heard this , he said , ' The divinely provided numinous presents were given to me once and to you thrice . You have travelled from afar and are diligent in your practice , and this is a manifestation of your reward . ' Therefore he ordered ( Ûisang ) compile and order them , so that he could glimpse the mysteries he had obtained . Thereupon ( Ûisang ) took up his pen and wrote out the Ta － sheng chang ' 大乘 章 in ten fascicles . He asked the Master to point out its faults . Yen said , ‘ The meaning is superb but the wording still obscures it . ’ So he retreated and cut out the complexity to make it all clear , and he titled it Li － i ch ' ung － hsüan 立 義 崇 玄 , for he wished to honour 崇 the meaning 義 of the ( Hua － yen ching ) sou － hsüan fen － ch ' i written by his master . Yen and Sang went to pray before the Buddha ( statue ) and made a vow to set fire to it , saying , ' If the words tally with the holy tenets , then we wish that they will not burn '. They gained 210 characters from the ashes . This caused Sang to gather them together and sincerely make a pledge . Yen , with tears in his eyes , sighed , and had ( Sang ) compose them into gathas . ( Ûisang ) closed himself up in a room for several evenings and formed thirty verses , which summed up the profound tenets of the three contemplations 三觀 and offered up the complementary beauty of the ten mysteries 十玄 . "