大乘起信論裂網疏 3.22

3.22

執著，即別境中勝解心所，及貪、瞋、慢等任運諸煩惱也。大凡一剎那心生已即滅，無執著義。由其前後相似相續，乃有執著功能，此相唯是第六識有，以七、八兩識及前五識唯緣現在一剎那境，無執著故。然如實觀之，能執著者即第六識見分，所執著者即第六識相分。見分剎那不住，何能執著？相分亦復剎那不住，何可執著？若能了知執著無相，即為證得如來智慧也。

Clinging is the mental factor of resolve among the particular states, as well as the spontaneous defilements such as greed, anger, and arrogance. Generally, a mind of a single instant perishes as soon as it arises, having no reality of clinging. Due to its continuity of similarity between prior and subsequent, there is then the function of clinging. This mark exists only in the sixth consciousness, because the seventh and eighth consciousnesses as well as the first five consciousnesses only condition an object of the present single instant and have no clinging. Yet contemplating it in accordance with reality, that which can cling is the perceiving component of the sixth consciousness, and that which is clung to is the image component of the sixth consciousness. The perceiving component does not abide for an instant; how could it cling? The image component likewise does not abide for an instant; how could it be clung to? If one can fully understand that clinging is devoid of marks, one will then realize the wisdom of the Tathāgata.