成唯識論演祕 1.817

1.817

既許一心雙緣二境，二境互從，是離不離實有自體現量所得。何所以者？不可一心分之為二，是以二境，更互相從名離、不離現量所得，由是「唯言」簡此不得。

Since it is accepted that a single mind concurrently cognizes two objects, the two objects follow one another, being apprehended by direct perception as an actual entity that is [both] separate and not separate. Why is this? A single mind cannot be divided into two; therefore, the two objects mutually accompany one another and are termed apprehended by direct perception as separate and not separate. For this reason, the word "only" cannot exclude this.