佛祖統紀 7.4

7.4

贊曰。昔在智者為佛所使。以靈山親聞法華之旨惠我震旦。乃開八教明三觀。縱辨宣說以被當機。可也。至於末代傳弘之寄。則章安侍右。以一遍記之才（昔河南有一遍照。蒲州有不聽泰）筆為論疏垂之將來。殆與慶喜結集同功而比德也。微章安吾恐智者之道將絕聞於今日矣。

The appraisal says: Formerly, Zhiyi was sent by the Buddha to bestow upon our Cīnasthāna the purport of the Lotus Sūtra that he had personally heard on Vulture Peak. He thus unfolded the eight teachings and illuminated the three contemplations, giving full scope to his eloquence in preaching to accommodate those of matching capacity; this was proper. As for the responsibility of transmitting and propagating it in later generations, it was Zhang'an who attended at his right side, and with the talent of remembering everything upon a single hearing—(In ancient times Henan had Yibianzhao [One-Hearing Zhao], and Puzhou had Butingtai [Never-Listens Tai])—recorded them into treatises and commentaries to hand down to the future. His merit and virtue were nearly equal to that of Ānanda's compilation! Without Zhang'an, I fear the Way of Zhiyi would have ceased to be heard today.