無量壽經優婆提舍願生偈註 1.77

1.77

問曰：上章云身不動搖而遍至十方。不動而至，豈非是一時義耶？與此若為差別？答曰：上但言不動而至，或容有前後；此言無前無後，是為差別。亦是成上不動義。若不一時則是往來，若有往來則非不動，是故為成上不動義，故須觀一時。

Question: The preceding section stated that 'without moving their bodies, they reach the ten directions everywhere.' Does reaching [everywhere] without moving not imply 'simultaneity'? What difference is there between that and this? Answer: The preceding section only stated reaching without moving, which might still admit of before and after. Here it says there is neither before nor after; that is the difference. It also establishes the meaning of 'unmoving' above: if it were not simultaneous, then there would be coming and going; and if there were coming and going, it would not be unmoving. Therefore, to establish the meaning of 'unmoving' above, one must contemplate simultaneity.