John 12:40 - "He has blinded their eyes and deadened their hearts, so they can neither see with their eyes, nor understand with their hearts, nor turn—and I would heal them." (NIV)
The Lord would heal people from their fallen state, if they would only turn. And yet because he has blinded them and deadened their hearts, this will never happen. I don't understand this. My human mind cannot grasp that there are those who are unable to accept Christ.
I have to assume that it's not that God has maliciously blinded these people, but rather that this is the effect that God has on people who have rejected him. And I also assume that although they cannot turn in their own strength, if the Spirit drew them, then they would be able to turn in Christ's strength, and receive the healing. I have assume there is always hope for the lost, and that is why I tell people about Christ.
There are things I don't understand about God. But I do understand that my part is to tell people about him.