Tang Sanzang and three other people went to the western sky to learn scriptures and encountered Fire Mountain. Bajie said, Let's just walk from where there is no fire. Tang Sanzang said, I just want to go to the place of the classics. Sha Wujing said, where there are scriptures, there is fire. What Sha Wujing means is that wherever there are scriptures, there is fire.
If Sha Wujing's words are true, then wherever there is fire, there are scriptures must be true.