Gary Thomas, in his book
Authentic Faith, tells the following story:
When we visited Knott's Berry Farm, an amusement park with a frontier theme, there were virtually no lines, and we went easily from major attraction to major attraction, in many cases walking right on. If the kids really enjoyed the ride, they stayed on and rode again.
My then six-year-old daughter Kelsey was having the time of her life. After about three hours, however, I noticed something curious. She jumped off some little cars; she had ridden a train, a log ride, a Ferris wheel, a flying school bus- you name it. Her words, however, revealed a spirit that was getting more hungry, not less: "What's next?" she asked, with a slightly desperate edge to her voice.
That's when I realized there's never quite enough excitement to quiet the human heart. We'll never have as much excitement as we want. This has been true from the beginning of time. (Gary Thomas, Authentic Faith, p.175)