A kite can't really fly free,that's just an expression. In order to soar high in the sky the string of a kite needs to be anchored. If the string breaks the kite drops back to the ground. The kite's freedom depends on it not being as free as he thinks it is.
Simon Napier-Bell, I'm Coming to Take You to Lunch: A Fantastic Tale of Boys, Booze and How Wham! Were Sold to China
freedom