成唯識論述記 5.32

5.32

述曰：下理成也，其文易解。若五識間斷，故前後定唯有意識。彼第三說，眼識率爾心後定有意識尋求，此後或時散亂，或是耳等識生故，非眼識後許耳識生。以此中言，眼識後唯意識，不言五識生故，即五十二。應云：若此一意識為彼六識緣，乃至此六識為彼一意識緣，以前後定唯有意故。

The Commentary states: Below is the establishment by principle; the text is easy to understand. If the five vijñānas are interrupted, then before and after there would definitely be only mano-vijñāna. That third fascicle says that after the abrupt mind of the eye-consciousness there is definitely the searching mano-vijñāna, and after this there is sometimes distraction, or the arising of consciousnesses like the ear[-consciousness]; it does not allow the arising of the ear-consciousness after the eye-consciousness. Because it is said here that after the eye-consciousness there is only mano-vijñāna, and it does not say that the five vijñānas arise, then the fifty-second fascicle should say: if this one mano-vijñāna is the condition for those six vijñānas, up to those six vijñānas being the condition for that one mano-vijñāna, because before and after there is definitely only the mind.