首楞嚴義疏注經 1.627

1.627

雖知見性唯心，未識真妄。若言是妄，如來又許獲妙明心，得清淨眼。若謂是真，前文廣破非真，乃云前塵虛妄相想，惑汝真性。進之又不可，退之又難明，羝羊觸蕃斯之謂矣。心既未了，口即默然，密冀如來慈音開示。

Although he knew that the seeing nature is solely the mind, he did not yet distinguish the true from the false. If one says it is false, the Tathāgata again grants the attainment of the wonderful bright mind and obtaining the pure eye. If one says it is true, the earlier text extensively refuted it as not true, saying that the false marks and thoughts of the front dust delude your true nature. Advancing is impossible, and retreating is hard to understand; this is truly what is called 'a ram ramming a hedge.' Since his mind was not yet clear, his mouth was silent, secretly hoping for the Tathāgata's compassionate voice to instruct him.