svāśrayeṣvanuvṛttasya cetaso hetubhāvataḥ // vijātibhyaś ca sarvebhyaḥ svāśrayasya viśeṣaṇāt / vyāvṛttibuddhihetutvaṃ teṣām eva tataḥ sthitam //
[This is] because they are causes of the cognition pervading their substrates and because they differentiate their substrates from all heterogeneous things - therefore their being causes of differentiating cognition is established.