[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