摩訶止觀 1.109

1.109

或聞生滅，即解四諦皆不生不滅，空中無刺，云何可拔？誰苦、誰集、誰修、誰證？畢竟清淨，能所寂然。願我得佛，能說淨道（云云）。

Or, upon hearing of arising and cessation, one immediately understands that the four truths are all neither arising nor ceasing. Within emptiness there is no thorn, so how could one pull it out? Who suffers, who accumulates, who cultivates, and who realizes? They are ultimately pure, subject and object both utterly tranquil. [Such a person vows:] "May I attain Buddhahood and be able to expound the pure path!" and so forth.