The serpent, too, is so strongly built that without wings it flies and without feet it walks. Also, if there is any animal which can be called the healthiest animal of all, it is the serpent. It is never ill; before it becomes ill it dies, yet it lives a very long time. It is said by those living in tropical countries that cobras can take revenge after as much as twelve years. If you once hit a cobra, it will always remember. That shows its memory, its mind. Music also appeals to the cobra as music appeals to intelligent men. The more unintelligent the man, the less music appeals to him; music is closely related to intelligence. This shows that every sign of intelligence, of wisdom, and of power is to be seen in the cobra.