金剛般若經旨贊 1.49

1.49

Sūtra: “…there will be those who uphold the precepts […] up to: regarding this as true.”
Commentary: Next, he clarifies that there are causes. Within this there are four: first, having long cultivated the practice of the three trainings; second, having encountered Buddhas and accumulated wondrous causes; third, being gathered and sustained by the Buddhas; fourth, having departed from hindrances and obtained superior retributions. Because of these four causes, they are able to faithfully accept it. This is the first cause.

The “three trainings” refers to morality, concentration, and wisdom. Because these three trainings fully encompass all practices, those who possess the three trainings know that the teachings accord with principle; hence, by possessing the three trainings, they can believe in this sūtra and take this sūtra to be true and in accord with principle. Since there are those who believe, it is not spoken in vain. Therefore, Vasubandhu’s treatise states in verse on this meaning: