成唯識論述記 10.48

10.48

述曰：無性云：得最勝無礙解，於諸智中此為最勝。智即是惠，故名善惠。世親云：「此惠妙善，故名善惠」，無性云：由法無礙解，自在了知一切法句；由義無礙，自在通達一切義理；由辭無礙，自在分別一切言辭；由辨無礙，遍於十方隨其所宜自在辨說，於此地中，最初證得先未曾得無礙解智，故名善惠。能遍十方者，《十地》云：「無礙力說法，成就利他行故」。

The Commentary states: Asvabhāva says: One attains the supreme unhindered understanding; among all wisdoms, this is the most supreme. Wisdom is intellect, hence it is called "Good Wisdom." Vasubandhu says: "This wisdom is wonderful and good, hence it is called Good Wisdom." Asvabhāva says: Due to the unhindered understanding of phenomena, one freely and thoroughly understands all phrases of the Dharma; due to the unhindered understanding of meaning, one freely penetrates all meanings and principles; due to the unhindered understanding of phrasing, one freely distinguishes all expressions; due to the unhindered understanding of eloquence, one freely elucidates and preaches throughout the ten directions in accordance with what is appropriate. In this ground, one first realizes the wisdom of unhindered understanding that had never before been attained, hence it is called Good Wisdom. Regarding being able to reach the ten directions, the Daśabhūmika says: "Through the power of non-obstruction, preaching the Dharma accomplishes the practice of benefiting others."