Bart Ehrman has a very popular book on the shelves now called God’s Problem. It was reviewed in the New Yorker recently, and the reviewer gives this very suggestive argument:
“But Heaven is also a problem for theodicists who take the freedom to choose between good and evil as paramount. For Heaven must be a place where either our freedom to sin has been abolished or we have been so transfigured that we no longer want to sin: in Heaven, our will miraculously coincides with God’s will. And here the free-will defense unravels, and is unravelled by the very idea of Heaven. If Heaven obviates the great human freedom to sin, why was it ever such a momentous ideal on earth, “worth” all that pain and suffering?http://www.newyorker.com/arts/critics/books/2008/06/09/080609crbo_books_wood
The difficulty can be recast in terms of the continuity of the self. If we will be so differently constituted in Heaven as to be strangers to sin, then no meaningful connection will exist between the person who suffers here and the exalted soul who will enjoy the great system of rewards and promises and tears wiped from faces: our faces there will not be the faces we have here. And, if there were to be real continuity between our earthly selves and our heavenly ones, then Heaven might dangerously begin to resemble earth.”
Here’s another closely related argument:
1. In heaven we either possess freewill to sin or we will not.
2. Being free and able to sin, all other things being equal, is a better state of affairs than not being free. (The Freewill Defense)
3. If we possess freewill to sin, then we will be able to sin.
4. If we are able to sin in heaven, then heaven will not be the best, most desirable, perfect place.
On a side note, if it is possible for God to make us free in heaven but prevent us from sinning, then it is possible for God to make us free and prevent us from sinning now. But according to the freewill defense, God makes us free but it is not possible for him to prevent us from sinning.
5. If we are not free to sin in heaven, then heaven will not be the best, most desirable, perfect place.
6. So heaven is not the best, most desirable, perfect place.