Kural - 965

If meanness, slight as 'abrus' grain, by men be wrought,
Though like a hill their high estate, they sink to nought

Explanation
Even those who are exalted like a hill will be thought low, if they commit deeds that are debasing.

Tamil Transliteration
Kundrin Anaiyaarum Kundruvar Kundruva
Kundri Anaiya Seyin.