Kural - 331

Lowest and meanest lore, that bids men trust secure,
In things that pass away, as things that shall endure

Explanation
That ignorance which considers those things to be stable which are not so, is dishonourable (to the wise).

Tamil Transliteration
Nillaadha Vatrai Nilaiyina Endrunarum
Pullari Vaanmai Katai.