觀無量壽佛經疏 2.92

2.92

四、從欲生彼國者下，至名為淨業已來，正明勸修三福之行。此明一切眾生機有二種：一者定，二者散。若依定行即攝生不盡，是以如來方便顯開三福，以應散動根機。言欲生彼國者，標指所歸也。

Fourth, from "those who wish to be born in that country" down to "they are called pure karma", it directly clarifies encouraging the cultivation of the practice of the three blessings. This clarifies that the capacities of all sentient beings are of two kinds: first, meditative; second, non-meditative. If one relies solely on meditative practice, it does not fully embrace sentient beings; therefore, as an expedient, the Tathāgata clearly opened the three blessings to correspond to distracted and agitated faculties and capacities. As for "those who wish to be born in that country": this indicates the destination to which they return.