How about an illustration of free will?
One of the controversial discussion points within Christianity is the question of free will. If God knows all of the future, furthermore, knows it because He predetermined the end from the beginning, then how can humans be said to have free will? It seems very much that we have free will. How are God's sovereignty and human will compatible? While not answering the question directly, Triablogue points to an excellent Mel Gibson flick to provide an example of how predestination and free will go hand-in-hand.