觀無量壽佛經疏 4.20

4.20

次就行立信者，然行有二種：一者正行，二者雜行。言正行者，專依往生經行行者是名正行。何者是也？一心專讀誦此《觀經》、《彌陀經》、《無量壽經》等。一心專注思想觀察憶念彼國二報莊嚴。若禮，即一心專禮彼佛。若口稱，即一心專稱彼佛。若讚歎、供養，即一心專讚歎供養。是名為正。又就此正中，復有二種：一者一心專念彌陀名號，行住坐臥不問時節久近念念不捨者，是名正定之業，順彼佛願故。若依禮誦等，即名為助業。除此正助二行已外，自餘諸善悉名雜行。若修前正、助二行，心常親近憶念不斷，名為無間也。若行後雜行，即心常間斷，雖可迴向得生，眾名疏雜之行也。故名深心。

Next, regarding establishing faith in terms of practice: practice is twofold. First is correct practice (zhenggxing); second is mixed practice (zaxing). 'Correct practice' means that one who practices purely in reliance upon the sūtras of rebirth [in the Pure Land] is said to engage in correct practice. What is this? Single-mindedly and exclusively reading and reciting this Dhyāna Sūtra, the Amitābha Sūtra, the Larger Sūtra, and so forth; single-mindedly and intently contemplating, observing, and recollecting the two adornments of retribution in that land; if one bows, single-mindedly and exclusively bowing to that Buddha; if one utters with the mouth, single-mindedly and exclusively calling upon that Buddha; if one praises and makes offerings, single-mindedly and exclusively praising and making offerings to [that Buddha]—this is called 'correct'. Furthermore, within this correct [practice], there are again two kinds: first, single-mindedly and exclusively reciting the name of Amitābha, whether walking, standing, sitting, or lying down, regardless of the duration of time, thought after thought without abandoning it—this is called the karma of correct determination, because it accords with that Buddha's vow. If one relies upon bowing, recitation, and so forth, these are called auxiliary karma. Except for these two practices of the correct and the auxiliary, all other various goods are called mixed practice. If one cultivates the former two practices, the correct and the auxiliary, and the mind constantly draws near [to the Buddha] with unceasing recollection, this is called uninterrupted. If one performs the latter mixed practice, the mind is constantly interrupted; although one may dedicate [merit] and attain rebirth, it is entirely named distant and mixed practice. Therefore it is called the deep mind.