俱舍論疏 3.15

3.15

論「意根二者至皆自在隨行」，此釋意根二增上。《正理論》云「有說意根於染、淨品有增上力，故言於二。如契經言：心雜染故有情雜染，心清淨故有情清淨。」

On the Śāstra's: "Regarding the two of the mental faculty: […] all follow along with it at will": this explains the two kinds of predominance of the mental faculty. The Nyāyānusāra says: "Some say that the mental faculty has predominant power with respect to the categories of defilement and purification; hence it says 'with respect to two'. As the sūtra states: 'Sentient beings are defiled because the mind is defiled; sentient beings are purified because the mind is purified.'"