[On] why your mother [is] not appearing [to] recover, [this] hindrance [is] with [her] past karma as caused, probably [with the] transformation [of otherwise] heavier retribution later, [being] retributed as present retribution, [that is] lighter retribution, at this time, with [it being] eradicated of.
[Even] Dharma Master Xuánzàng, [when] approaching [the] end [of life], also had [a] little suffering [due to] sickness. [In his] mind, [he] suspected that of [the] sūtras [he] translated, [there] were perhaps mistakes.
[There] was [a] Bodhisattva [who came to] console [him by] saying, ‘[As] your past kalpas’ transgressions’ retribution, all [are] with [experience of] this little suffering [being] eradicated of, [do] not doubt.’
[You] should with this meaning console your Mother. Encourage [her to] give rise [to the faithfully] joyful mind, [and] not give rise [to a] resentful mind [when being mindful of Amitābha Buddha’s name (i.e. Āmítuófó) sincerely]. Thus, [she] definitely [will be] able [to] receive [the] Buddha’s blessings and protection. [If her] lifespan [is] yet [to] exhaust, then [will there be] swift healing. [If] already exhausting, then [will there be swift] rebirth [in his Pure Land].
Pure Land Tradition’s 13th Patriarch Great Master Yìnguāng
Reply letter to Zhōu Mèngyóu’s brothers
Note: As long as there is continual practice of what is right, for example, with sincere (repentance), mindfulness of Buddha (and dedication of merits), all present suffering is definitely of past negative heavier karma being more lightly experienced (重业轻受). This is so as mindfulness of Buddha practice eradicates karmic obstacles (念佛消业障).
Namo Amituofo : Translation and note by Shen Shi’an