說無垢稱經疏 4.432

4.432

贊曰：此二句，有智能論德。方便者，智妙用趣況及所歸處，故能問答無畏自在。若摧他論，妙達自宗，論式論嚴無不解故。

Commentary: These two clauses concern the virtue of possessing wisdom and being able to debate. "Upāya" refers to the subtle applications, directions, circumstances, and destination of wisdom; therefore, he is fearless and masterful in questions and answers. If he dismantles the treatises of others, he subtly penetrates his own tenets, for there are no rules of debate or ornamentations of debate that he does not understand.