法華經義記 5.52

5.52

問者言：「佛明知眾生必失此大乘解，于時何故用此大乘化之？」解釋者言：「佛于時實知眾生得解之後必失，但于時大乘機感佛，佛仍為說大乘，若有感不應，則有差機之失。既得此解，如來更化他方眾生，遂起煩惱失此大乘解也。」

A questioner asks: 'The Buddha clearly knew that sentient beings would definitely lose this understanding of the Great Vehicle; why then did he use this Great Vehicle to transform them at that time?' The commentator explains: 'At that time the Buddha truly knew that after sentient beings attained understanding they would definitely lose it. However, at that time their capacity for the Great Vehicle affected the Buddha, and so the Buddha still spoke the Great Vehicle for them; if there is a stimulus and he does not respond, then there would be the fault of failing to meet their capacity. Once they attained this understanding, the Tathāgata went on to transform sentient beings in other regions, whereupon they gave rise to afflictions and lost this understanding of the Great Vehicle.'