The Frog in the Well

Once there was a turtle who came across a well.  He looked down into the well and saw a frog sitting at the bottom.  "Hey!" the turtle said, "what are you doing at the bottom of the well?"  "I don't understand what you mean," the frog replied.  "I am very happy down here."

"But don't you want to see the sky?" the turtle asked.  "Why?" the frog replied, "The sky is only a small circle and I can see all of it from here." 

"That's not correct," the turtle said.  "The sky is vast and immense and even if a thousand birds fly overhead it does not obscure the sky a bit. You have been down in that well too long and you have forgotten how big the sky is!"