A cat tale about the tail of a cat

A big cat saw a little cat chasing its tail and asked, "Why are you chasing your tail so?"

Said the kitten "I have learned that the best thing for a cat is happiness and that happiness is in my tail. Therefore I am chasing it and when I catch it, I shall have happiness."

Said the old cat "My child, I too have paid attention to the problems of the universe. I too have judged that happiness is in my tail. But I have noticed that whenever I chase it, it runs away from me, but when I go about my business, it just seems to come after me wherever I go."