成唯識論述記 6.326

6.326

述曰：亦牒頌解，謂輕而安隱；離重名輕，調暢名安。此有二種：一、無漏者。除有漏麁重，麁重通三性；二、有漏者。除煩惱麁重，唯是善性。此正對治惛沈一法，然《對法》說：「除一切障」，《顯揚》云：「除麁重」；然《對法》第十說亦同之。彼約通障，此約別障；以惛沈是無堪任性，安是堪任，故唯除彼。

The Commentary states: This also cites the verse to explain it: it means being light and at ease. Being free from heaviness is called 'pliant' (light); being harmonious and unobstructed is called 'serene' (at ease). This has two kinds: first, the uncontaminated, which eliminates contaminated heaviness, heaviness running through the three natures; second, the contaminated, which eliminates the heaviness of afflictions, being solely of the wholesome nature. This directly counters the single dharma of torpor; however, the Abhidharma-samuccaya says: 'eliminating all hindrances,' and the Prakaraṇāryavācā says: 'eliminating heaviness'; fascicle ten of the Abhidharma-samuccaya also states the same. Those are based on general obstacles, whereas this is based on a specific obstacle; because torpor is the nature of unfitness, while serenity is fitness, it solely eliminates that [torpor].