Kural - 990

The mighty earth its burthen to sustain must cease,
If perfect virtue of the perfect men decrease

Explanation
If there is a defect in the character of the perfect, (even) the great world cannot bear (its) burden.

Tamil Transliteration
Saandravar Saandraanmai Kundrin Irunilandhaan
Thaangaadhu Manno Porai.