The article examines changes in Wŏnhyo's text "Special Exposition on the ‘Awakening of Faith’" and suggests it may have been altered over time. By comparing the length and content of different versions, the researchers found discrepancies and unique concepts in the text. They propose that a similar text called '색부찬(塞部撰)' 『사기』 may have influenced the current version of the 'Special Exposition'. This suggests that the text we have today might not be exactly as Wŏnhyo originally wrote it, but could have been modified by later generations.