मनुस्मृति - बुद्धिर्ज्ञानेन शुध्यति

अद्भिर्गात्राणि शुध्यन्ति मनः सत्येन शुध्यति ।
विद्यातपोभ्यां भूतात्मा बुद्धिर्ज्ञानेन शुध्यति ॥

- मनुस्मृति

adbhiH gAtrANi shudhyanti manaH satyena shudhyati ।
vidyA tapobhyAm bhUtAtma buddhiH jnAnena shudhyati ॥

- manusmRuti

Water cleanses the body parts. Mind is cleansed by truth. Education and penance will cleanse the human soul. Intellect is cleansed by knowledge.

- Manu Smriti