大方廣圓覺修多羅了義經略疏 1.621

1.621

夢中見夢，轉轉覺於前非，直到寤時所見方實，故云爾也。無所離者，有其二意：一則冥於真覺，真覺則不可離；二則到真覺之中，自然無如上節節之幻可離。故荷澤云：「妄起即覺，妄滅覺滅，覺妄俱滅，即是真如。」

Seeing a dream within a dream, one successively realizes the previous error, and only upon waking is what one sees real; hence it is said thus. Having "nothing to depart from" has two meanings: first, merging with true enlightenment, true enlightenment cannot be departed from; second, arriving within true enlightenment, there is naturally no illusion from the preceding successive stages that can be departed from. Hence Heze said: "When delusion arises, one awakens; when delusion ceases, awakening ceases; when both awakening and delusion cease, that is tathatā."