How Impossible Is It To Lose The New Birth?
You cannot lose the new birth because it is based on the death and resurrection of Jesus. Jesus would have to come off the Cross. Jesus would have to go back in time and not die for us ... to do that, God would have to not have the love that passion that behooved Christ to die for us.
Jesus had a freewill like us to not die for us. He could've called more than twelve legions of angels to kill the human race for its rebellion against God instead of die for them. But like Christians, He used His freewill to choose to die instead of deny us.

