Verse 169: Testing reveals truth
169. Testing reveals truth
கீறுதல் கேடெனக் கொள்வர் உரைகல்லில்ஏறுவது மெய்ம்மை நிறம்
keerudhal kedenak kolvar uraikallileruvadhu meymmai niram
People take the scratching for harm; the streak that comes up on the touchstone shows the true colour.
A touchstone is a dark stone: precious metal rubbed on it leaves a streak whose colour shows how pure it is.