Sanskrit: यथोदकं शुद्धे शुद्धमासिक्तं तादृगेव भवति ।  एवं मुनेर्विजानत आत्मा भवति गौतम ति काठकोपनिषदि द्वितीयाध्याये प्रथमा वल्ली  
English: 15  As pure water poured into pure water becomes one with it, so also, O Gautama, does the Self of the sage who knows. 