etac ca pūrvaṃ prasādhitaṃ punar api bhūyaḥ pramāṇayati prayogaḥ ye ye manoguṇās te 'bhyāsātiśaye sati sambhavat prakarṣaparyantvṛttayaḥ, yathā śrotriyajodiṃga{---}nairghṛṇyam, manoguṇaś ca prajñeti svabhāvahetuḥ /
This has been established before and is further proven by the following formal argument: Whatever qualities of mind there are, they can potentially reach their ultimate limit when there is excellence of practice, just as [in the case of] the cruelty of Vedic sacrificers; and wisdom is a quality of mind—this is a reason based on essential nature.