四明十義書 2.20

2.20

是知荊溪數云：不得將一二句觀心修行及驢車之責，正斥邪解之師別指一文立為頓頓義，旁誡初心不稟師氏口決（已於一家解行通達，亦得口決示於學者，故荊溪於左溪室中咨稟口決也。又《輔行》云：若近師氏，理須咨疑等云云）。專執一句即足之者也。

Hence we know that Jingxi repeatedly said that one must not take one or two phrases of contemplating the mind for cultivation, and reproached it as a donkey cart; this directly refutes teachers of deviant understanding who pick out an isolated passage to establish as a sudden-sudden meaning, and secondarily admonishes beginners who do not receive the master's oral instructions (having attained thorough understanding in the understanding and practice of our school, they can also receive oral instructions to show students; thus Jingxi sought oral instructions in the room of Zuoxi. Furthermore, the Fuxing says: 'If one is close to a teacher, in principle one must consult on doubts,' and so on), exclusively clinging to a single sentence as sufficient.