法華玄論 5.157

5.157

答：具有二義。一者眾生本有佛知見名之為因，外假佛說一乘教顯眾生本有知見之義故名緣，因緣具足故名為開。若眾生無佛知見，雖有教門，何所開耶？雖有知見，無佛教者，何由得開？故佛教為能開，佛知見為所開也。二者因緣即是所以。三世諸佛何所以故出現於世？正為大事因緣開示悟入諸佛知見，故出現於世也。

Answer: It has two meanings. First, sentient beings' fundamental possession of the knowledge and vision of the buddhas is named the cause; externally relying on the Buddha's preaching of the one vehicle teaching to reveal the meaning of sentient beings' fundamentally possessed knowledge and vision is named the condition; because causes and conditions are complete, it is called opening. If sentient beings lacked the knowledge and vision of the buddhas, although there were the teaching gate, what would be opened? Although they possess the knowledge and vision, if there were no Buddhist teaching, how could it be opened? Therefore, the Buddhist teaching is that which can open, and the knowledge and vision of the buddhas is that which is opened. Second, causes and conditions is precisely 'the reason'. For what reason do all the buddhas of the three periods appear in the world? Precisely for the causes and conditions of the great matter of opening, showing, awakening, and entering the knowledge and vision of all buddhas do they appear in the world.