Translation: No art is greater than the art of questioning (and listening to responses).
Speaking of which, there is one subcategory specifically assigned for questioning (and correspondingly, listening to the responses). Totaling 1,330 in all, they are grouped into Personal (அகத்துப்பால்), Business (பொருட்பால்), and Pleasure (காமத்துப்பால்), with many subcategories (10 couplets) within each covering a wide range of topics. Each couplet is written in two lines totaling seven words, typically broken into 4-3. Estimated to be written around 50BC by a Jain monk, the couplets have a spiritual tone but does not emphasize a specific religion.
Kurals or couplets themselves are interesting in a literary sense. While there are several great literary works in Thamizh, the state government of Tamilnadu has picked திருக்குறள் (Thirukkural) by திருவள்ளுவர் (Thiruvalluvar) as the symbol of Thamizh literature, so much so that there is a big memorial in the shape of a chariot in Chennai called Valluvar Kottam and the kurals themselves are inscribed in all government buses, which was a good thing because you had to memorize at least ten of these for exams in middle school!