हंसः श्वेतो बकः श्वेतः को भेदो बकहंसयोः ।
नीरक्षीरविवेके तु हंसो हंसो बको बकः ॥
haṁsaḥ śveto bakaḥ śvetaḥ ko bhedo baka-haṁsayoḥ |
nīra-kṣīra-viveke tu haṁso haṁso bako bakaḥ ||
(Unknown source)
“A swan is white; a stork is white.
What is the difference between a swan and a stork?
In discriminating between water and milk,
A swan is a swan, and a stork is a stork
[i.e., one can do so and the other cannot].”