阿彌陀經通贊疏 2.109

2.109

答：「業累輕尠、善種增強，既非分段之身，永離去來之質，與佛齊等，於理無違。故《無量壽經》曰：彼佛壽命長遠不可稱計，假使十方世界無量眾生皆成羅漢，共盡思惟百千萬劫不知壽限，菩薩天人壽命亦爾。又《清淨覺經》云：阿彌陀佛欲令十方一切有情之類生其國悉至泥洹，若菩薩者皆令作物，作物已更展轉教化十方之類亦復作佛，作佛已更轉教化一切眾生悉至泥洹，然後涅槃。是知壽命無量也。」

Answer: 'Their karmic burdens are light and few, and their seeds of goodness are reinforced; no longer possessing bodies of fragmentary samsāra, they have forever transcended the forms of coming and going. That they are equal to the Buddha does not violate principle. Thus the Amitāyus Sūtra states: "That Buddha's lifespan is long and cannot be calculated. Even if immeasurable sentient beings in the worlds of the ten directions were all to become arhats and together exhaust their contemplation for hundreds of thousands of kotis of kalpas, they could not know the limit of his lifespan; the lifespan of the bodhisattvas, devas, and humans is also like this." Furthermore, the Qingjingjue jing states: "Amitābha Buddha wishes to cause all types of sentient beings in the ten directions born in his land to reach nirvāṇa; if they are bodhisattvas, he causes them all to become Buddhas; having become Buddhas, they in turn teach and transform beings of the ten directions so that they also become Buddhas; having become Buddhas, they in turn teach and transform all sentient beings so that they all reach nirvāṇa, after which he enters parinirvāṇa." From this we know his lifespan is immeasurable.'