俱舍論疏 1.180

1.180

論「如有頌言至同修勇進樂」，第三引例證也。諸佛出世等，與樂為因，名為樂也。問：澁、滑、輕、重各相對立，何故對冷不說煖耶？答：煖是能造，即是火大，故不說也。

[Regarding the] treatise's [statement]: "As a verse states: […] and joy in practicing together with vigor": the third [part] cites examples to verify. The appearance of the Buddhas in the world and so forth serve as causes for bliss, and are thus called bliss. Question: Rough and smooth, light and heavy each stand in mutual opposition; why is warmth not spoken of as the opposite of cold? Answer: Warmth is a primary maker—namely, the fire element—and is therefore not mentioned.