My free will is already limited by the world I live in. I can't just will that I will float in the air, and then I will float. I can't will that my body will become indestructible. I can't will that food will pop into existence in front of me when I get hungry.
There are many, many, many ways in which my free will is limited by nature, yet people would still call me free. So, why then is the line drawn where it is? Why am I free to murder and rape and lie. Why aren't those actions equally impossible for me to physically do?
If god truely values good, but hates evil, why would he give us the ability to do so much evil, while limiting our ability to do other evils? Is the ability to stab someone with a sharp object somehow required for free will? I don't think so.
This gets worse when you consider heaven, but that can be addressed in another reply.
It's been told to you already. I don't know why atheists have such bad memory, or exemplify such refusal to listen to the answers provided.
The inherent possibility of corruption is due to being created: that is, coming out of nothing. As such, all that is contingent can cease being, since it is contingent(it can also NOT be)
God cannot make something that is inherently contingent, due to being created, to be necessary, thus inherently eternal, as that's simply impossible: you cannot have a beginning, yet also not have a beginning; nor can you be contingent, yet also necessary at the same time in the same sense.
Any action, or state of being, in such a case has tendency to either increase in the excellence of its naturally good properties, or to decrease in these properties. So, contingency brings two inherent possibilities: to decrease, or outright eradicate, essentials; or to follow one's telos, thus increase, or achieve perfection, in essential his essential good.
For example: God couldn't possibly make it that contingent movement - such as walking, - is impossible to contain the possibility of "tripping up". No, you, as a created person in created reality, can always fail to pay attention where and how you're walking, thus bump into something, which trips you up, thus you fall down. Not only, but you can also deliberately bump into stuff, in order to fall - have you seen the Jackass movie?
It's simply inherent to the fact of contingent movement in contingent reality. What God can, though, is make you such a person, who always make the proper decision and pays attention to the right things, which keeps him from falling.
The possibility of corruptibility is always inherent to contingency. If I have arms, with which I can hug, they can also strangle. If I have hands, with which I can gently caress you, they can also be used to steal, or murder. And so on. So, contingent good comes with the possibility of corrupting it, thus turn it into contingent sin, thus contingent evil.
God didn't give you the ability to do evil, you've chosen to corrupt the ability He has given you to do good. These are two very different things: God did not thought of the evil and invented it; He only provided the contingent good, which you then used your mind to pervert and abuse, thus use it sinfully, therefore have yourself abide in evil.
Not too sure why atheists have such a hard time remembering such basic notions within Christian philosophy that deal with the stupid objection of "but why can't there be no evil whatsoever? GOD MUST HAVE CREATED IT!". No, you're simply not analyzing what contingency means and how free will can abuse the possibilities that contingency brings, which are inherent to contingency.
