NEW YORK -- Actor Kirk Cameron releases a new documentary next week called "Unstoppable."
In it, he explores an age-old question: Why does God allow suffering and evil in the world? Cameron said that is the question that often wrecks people's faith.
The film, he says, is based on a true story. Cameron recently lost a teenage friend to cancer -- a tragedy that sent him searching for answers.
"That event really hit me hard," he told CBN News. "It really pulled all of the air out of my lungs because this was a good boy, a boy from a great family who loved God and went to church."
"And when he died," Cameron continued, "and God did not heal him in spite of all the prayers, in spite of all the people crying out to God, it really caused me to ask the big question: where is God in the midst of my tragedy?"
Cameron said "Unstoppable" takes him on the most personal journey of his life where he has to examine his own faith, and he does it by going all the way back to the origins of good and evil.
"What I discovered is that it's much better to understand your tragedy and mine in the context of a much larger story," he said. "And so what I do is I try to take you up to Heaven's balcony and give you a wide angle lens view of history, and we start in the Garden of Eden."
In the film, Cameron said he overcomes his own doubts and that he comes out on the other side of this meat grinder even stronger in his faith.
"Regardless of our background -- whether you're Jewish or Christian, Muslim or atheist or agnostic -- we all ask this question," he told CBN News.
"It's easier to be excited about your beliefs, whatever they are, when things are going well in your life, when you're happy and healthy," he added. "But when the roof comes down and you get hit by something you didn't see coming, all of a sudden the questions begin." Cameron said. "I think you will come out on the other end of this movie not having your faith shredded like has happened to many, but you will have it strengthened like it did for me."
Back in July, "Unstoppable" created a social media firestorm when Facebook and YouTube blocked access to the movie trailer. That's when over half a million of the actor's fans rallied around him.
Facebook later said it was just a mistake and both sites ended up removing the block.
"Unstoppable" opens in theaters Sept. 24. That night, Cameron will broadcast a special event from Liberty University. He said he wants to settle once-and-for all that good is stronger than evil and that faith is stronger than doubt.