摩訶止觀 5.6

5.6

「陰」在初者二義：一、現前，二、依經。《大品》云：「聲聞人依四念處行道；菩薩初觀色乃至一切種智。」章章皆爾，故不違經。又行人受身，誰不陰入重擔現前？是故初觀。後發異相，別為次耳。

The aggregates come first for two reasons: first, they are present before us; second, they follow the sūtras. The Mahāprajñāpāramitā-sūtra says: "Śrāvakas practice the path relying on the four stations of mindfulness (smṛtyupasthāna); bodhisattvas begin by contemplating form up to the knowledge of all aspects (sarvākārajñatā)." Every chapter is like this, so it does not contradict the sūtras. Furthermore, when a practitioner takes on a body, who does not have the heavy burden of the aggregates and sense fields present before them? Therefore, they are contemplated first. The subsequent arising of different signs is distinguished sequentially.