維摩經玄疏 5.44

5.44

三、法為經者，「法」是法塵，心與法合，內心思惟，修習於法，因法見理，法即是經。故經云：「修我法者，證乃自知。心無實行，何用問為？」

Third, regarding mental objects (dharmas) as sūtras: "Dharma" is the dust-object of dharmas. When mind unites with dharmas, one contemplates internally, practicing the dharmas; through dharmas one sees principle, so dharmas are themselves the sūtra. Therefore, a sūtra says: 'Those who cultivate my Dharma know by self-realization. If the mind lacks real practice, what is the use of asking?'