成唯識論述記 7.512

7.512

The Commentary states: This text is the third objection, based on conflict with the sacred teachings. The opponent asks: If there are no real eyes, forms, and so forth outside the mind, for what reason did the World-Honoured One speak of the twelve āyatanas in the sūtras? He should only have spoken of the mind āyatana and the phenomena āyatana! The older translation of Vijñaptimātra says: "Because the Āgamas are the supreme teaching"—thus they cite the sūtras to raise the objection.