'He who meditates on the mind as Brahman, is, as it were, lord and master as far as the mind reaches—he who meditates on the mind as Brahman.' 'Sir, is there something better than mind?' 'Yes, there is something better than mind.' 'Sir, tell it me.'

In plain words: Whoever honors the mind as Brahman has mastery as far as the mind reaches. Narada asks for something greater than the mind, and the teacher agrees to tell him.