一念信阿彌陀佛之本願，而往生淨土之業成辨也。
At one thought the work completed; karma complete in one thought. One repetition, or sincere thought of or faith in Amitābha's vow, and entrance into the Pure Land is assured.
一一念業成 指行者之信心與佛智之一念相應冥會時，即能往生彌陀淨土。此乃日僧幸西所立之一念義。（參閱「一念義多念義」77）p76
只要一念堅信阿彌陀佛的本願，就可以成就往生西方極樂世界之業。