法華玄義釋籤 17.67

17.67

七明助道中本治事障，今以理觀者何耶？此中約第一義治，故作是說。若事障興應觀諦理，生死煩惱即涅槃菩提，故能治之。六即之位約一心理，生死煩惱可知。

Seventh, in explaining auxiliary paths: originally they remedy phenomenal obstacles; why are they now treated through contemplation of principle? Because here they are treated in terms of the primary truth, it is spoken of in this way. If phenomenal obstacles arise, one should contemplate the principle of the truths: samsāra and afflictions are themselves nirvāṇa and bodhi, and therefore can remedy them. The stages of the six identities pertain to the principle of a single mind; samsāra and afflictions may be understood accordingly.