This is one of the poems in "Moothurai" Written by the great Tamil Poet Avvaiyar (also Auvaiyar).
Neeralave aakumaam neeraambal Thaan Katra Noolalave aakumaam Nunnarivu.
The above lines in English,
Lily always rises up only to the level of water in the pond. One’s subtle knowledge will always be at the level of his learning of Books.