Thirukkural

அறத்தான் வருவதே இன்பம் மற்றெல்லாம் புறத்த புகழும் இல.

Araththaan Varuvadhe Inpam Mar Rellaam Puraththa Pukazhum Ila

Only that pleasure which flows from domestic virtue is pleasure; all else is not pleasure, and it is without praise