妙法蓮華經玄義 10.41

10.41

次難六宗者，四宗如前難。今問：真、常兩宗，真、常若同，何故開兩？真、常若異，俱非妙法。何者？真若非常，真則生滅；常若非真，常則虛偽。又真若非常，與前三宗何異？若常非真，即有破壞法。

Next, I critique the six tenets: the four tenets are criticized as before. Now I ask: regarding the two tenets of the true and the eternal, if the true and the eternal are the same, why divide them into two? If the true and the eternal are different, neither is the wonderful Dharma. Why? If the true were not eternal, the true would be subject to arising and perishing; if the eternal were not true, the eternal would be false and deceptive. Furthermore, if the true were not eternal, how would it differ from the preceding three tenets? If the eternal were not true, it would be a destructible dharma.