大乘起信論別記 1.177

1.177

「平等緣」者，為諸菩薩業識熏習而作緣也。能緣者，「法身菩薩」已上，方得作緣，要依「同體智力」故，「依於三昧」乃得。「平等見諸佛」者，十解已上諸菩薩等，皆業識見佛報身，無量相好皆無有邊，離分齊相，故言平等見也。若在散麁心中，得見如是不思議相，則無是處，故言「依於三昧乃得見」也。

"Impartial condition" means acting as a condition for the vāsanā of the karmic consciousness of the bodhisattvas. As for those capable of acting as conditions, only those who are "bodhisattvas of the dharmakāya" and above can act as conditions; this is necessarily because they rely on the "power of cognition of identical essence" and "rely on samādhi." Regarding "impartially seeing the Buddhas," the bodhisattvas from the ten understandings upward all see the saṃbhogakāya of the Buddha through the karmic consciousness, with immeasurable marks and characteristics that are all boundless, free from characteristics of limitation; therefore it is said that they "impartially see." If, while in a scattered and coarse state of mind, they were to see such inconceivable characteristics, that would be impossible; hence it says "it is only by relying on samādhi that they are able to see."