The below is taken from Laz's blog post concerning the book The Northern Lights (and now movie: The Golden Compass). It is a quote of C. S. Lewis that Laz uses to buttress his arugment that follows in his post titled CS Lewis Posthumously Corrects Philip Pullman.
There is no need to be worried by facetious people who try to make the Christian hope of “Heaven” ridiculous by saying they do not want “to spend eternity playing harps.” The answer to such people is that if they cannot understand books written for grown-ups, they should not talk about them…
A child saying a child’s prayer looks simple. And if you are content to stop there, well and good. But if you are not–and the modern world usually is not–if you want to go on and ask what is really happening–then you must be prepared for something difficult. If we ask for something more than simplicity, it is silly then to complain that the something more is not simple.
Very often, however, this silly procedure is adopted by people who are not silly, but who, consciously or unconsciously, want to destroy Christianity. Such people put up a version of Christianity suitable for a child of six and make that the object of their attack. — C.S. Lewis
If you haven't visited Lastrow, Laz's blog, you definitely want to check it out. He updates frequently and his writtings are well thought out and are about great issues upon which to ponder.
You can read more here.