瑜伽師地論略纂 14.76

14.76

論云「又諸善法或由加行力」等者，謂今身起加行。　「由自性」等者，謂前身多串習此善，善根增勝，不由加行串習，名自性力。　「田士力」者，謂於功德田中起，如供養佛等。　「或由清淨力」者，謂上二界所有善心，離欲染，體清淨。離欲者，體清淨故，其善亦淨。又有學、無學所有無漏善心，皆名清淨力。

The treatise says: "Furthermore, wholesome dharmas [arise] either through the power of application..." and so forth. This refers to generating application in this present life. "Through [the power of] innate nature..." and so forth: this means having repeatedly habituated this wholesome [state] in previous lives, so that the wholesome roots are increased and superior, not requiring the habituation of [present] application, which is called the power of innate nature. "The power of the field and person" means arising in relation to a field of merit, such as making offerings to the Buddha. "Or through the power of purity" refers to all wholesome minds in the upper two realms, which are free from the defilement of desire and pure in essence. Because one free from desire is pure in essence, their wholesomeness is also pure. Furthermore, all uncontaminated wholesome minds of trainees and non-trainees are named the power of purity.