One thing I admire about C.S. Lewis is his full candor when dealing with skeptics. He won’t tolerate “bumper sticker” answers from anyone, but especially those who do not believe and ridicules those who do.
In his chapter on heaven in Mere Christianity, he wrote this:
There is no need to be worried by facetious people who try to make the Christian hope of ‘Heaven’ sound 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.