a canary and a lark

The following converstation occurred between a canary in a cage and a lark on the window sill. The lark looked in at the canary and asked, "What is your purpose?"
"My purpose is to eat seed."
"What for?"
"So I can be strong."
"What for?"
"So I can sing," answered the canary.
"What for?" continued the lark.
"Because when I sing I get more seed."
"So you eat in order to be strong so you can sing so you can get seed so you can eat?"
"Yes."
"There is more to you than that," the lark offered. "If you'll follow me I'll help you find it, but you must first leave your cage."

In the Grip of Grace, Max Lucado