Thirukkural 457

மனநலம் மன்னுயிர்க் காக்கம் இனநலம் எல்லாப் புகழும் தரும்.

Manam-nalam man-nuyir-k kaakkam ina-nalam ellap pugalum tarum.

Guard the steadiness of mind as you would guard your own life. Kinship nurtured well brings all honor in return.