[621] **If one has fallen away from virtue and vows (sīlavata):** one falls away from virtue and vows (sīlabbata) for two reasons: one falls away through another's decisive verdict, or one falls away through failing to achieve.
How does one fall away through another's decisive verdict? Another decides thus: "That teacher is not omniscient; the Dhamma is not well proclaimed; the group is not practicing well; the view is not good; the practice is not well laid down; the path is not emancipating; therein there is no purity, no higher purity, no complete purity, no release, no deliverance, no complete deliverance; therein beings are not purified, are not thoroughly purified, are not completely purified, are not released, are not delivered, are not completely delivered; they are inferior, base, deficient, vile, mean, insignificant" — thus another decides. Being thus decided against, one falls away from the teacher, falls away from the teaching of the Dhamma, falls away from the group, falls away from the view, falls away from the practice, falls away from the path — thus one falls away through another's decisive verdict.
How does one fall away through failing to achieve? Failing to achieve virtue, one falls away from virtue; failing to achieve the vow, one falls away from the vow; failing to achieve virtue and vows, one falls away from virtue and vows — thus one falls away through failing to achieve. Hence: "If one has fallen away from virtue and vows."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.