觀無量壽佛經疏 4.13

4.13

二者深心，言深心者，即是深信之心也。亦有二種。一者決定深信，自身現是罪惡生死凡夫，曠劫已來常沒常流轉，無有出離之緣。二者決定深信，彼阿彌陀佛四十八願攝受眾生，無疑無慮，乘彼願力定得往生。

The second is the deep mind. The 'deep mind' is the mind of deep faith. It also has two aspects: First, one resolutely and deeply believes that one is presently a sinful ordinary person of saṃsāra, who since beginningless kalpas has constantly sunk and constantly transmigrated, with no condition for escape. Second, one resolutely and deeply believes that Amitābha Buddha's forty-eight vows embrace and receive sentient beings, and that without doubt and without worry, by relying on the power of his vows, one is certain to attain rebirth.