Kural - 425

Wisdom embraces frank the world, to no caprice exposed;
Unlike the lotus flower, now opened wide, now petals strictly closed

Explanation
To secure the friendship of the great is true wisdom; it is (also) wisdom to keep (that friendship unchanged, and) not opening and closing (like the lotus flower).

Tamil Transliteration
Ulakam Thazheeiya Thotpam Malardhalum
Koompalum Illa Tharivu.