The free will argument demonstrates that christians don't understand free will.

[RobbyPants]

And really? A world without any negative aspects...can you be any more vague? The devil is in the details, friend.

Heaven. At least, most adherents say that it's supposed to be perfect. That notion of heaven seems to wreak havoc on free will arguments, though. It always ends the same: if a perfect heaven can exist, then a perfect existence can exists. It's tautologically true.

Either heaven isn't as good as Christians say it is, or God is holding back here for arbitrary reasons and we suffer solely because he wants us to. God saying that we need to be tested before we can get to heaven is arbitrary. The test is arbitrary. If we can love him in heaven with our without free will (and we aren't killing or raping each other up there), then giving us the ability to kill and rape each other down here is pointless.

Unless you're going to try to defend the "test" as some form of justice, in which case:

• "Justice" is a concept more powerful than God, to which he is beholden, or
  
• it's arbitrary and unnecessary.
  

Or, to sum it up

• He is not able
  
• He is not willing