大般涅槃經義記 4.11

4.11

就初對中，「以是義」者，以是凡夫偏取皆是斷常義故，理須並學。「修餘法苦皆名不善、修餘法樂名為善」者，學觀名修，苦是生死、樂是涅槃，相對辨異是以言「餘」。不善苦因，因從果稱，故名為苦，亦可苦果從因以目說為不善；善是樂因，因從果稱，說之為樂，亦可樂果從因以名故說為善。

In the first pair, 'by this meaning' means that because the one-sided graspings of ordinary beings are all matters of annihilation and permanence, according to the principle one must study both together. 'Cultivating other dharmas as suffering is all named unwholesome; cultivating other dharmas as bliss is named wholesome': learning and contemplating is called 'cultivating'; suffering is saṃsāra and bliss is nirvāṇa; contrasting them to distinguish their difference is why it says 'other.' Unwholesome is the cause of suffering, and the cause is named after the fruit, hence it is called suffering; alternatively, the fruit of suffering is designated from the cause and spoken of as unwholesome. Wholesome is the cause of bliss, and the cause is named after the fruit, spoken of as bliss; alternatively, the fruit of bliss is named from the cause and therefore spoken of as wholesome.