Thayumanavar, has left us the following challenging poem: You can control a mad elephant; You can shut the mouth of the bear and the tiger; You can ride a lion; You can play with the cobra; By alchemy you can eke out your livelihood; You can wander through the universe incognito; You can make vassals of the gods; You can be ever youthful; You can walk on water and live in fire; But control of the mind is better and more difficult.