瑜伽論記 5.282

5.282

自性清淨者，明思慧體，簡生得善，故名清淨。思擇所知者，思擇一切所應知法。思擇諸法者，思擇佛經長行及頌諸要義者。

'Naturally pure' explains the substance of reflective wisdom; it is distinguished from innately acquired goodness, and therefore called 'pure'. 'Reflective discrimination of what is to be known' means reflecting upon and discriminating all dharmas that ought to be known. 'Reflective discrimination of dharmas' means reflecting upon and discriminating the essential meanings of the prose and verses of the Buddhist scriptures.