Some viewers see the crops circles as the 'signs' that aliens are coming. However, the major point of the movie is not about an alien invasion but about the idea of coincidences and seeing signs from them. Graham sums up the point of the movie when he tells his brother Merrill (Joaquin Phoenix), 'People break down into two groups when they experience something lucky. Group 1 sees it as more than luck, more than coincidence. They see it as a sign, evidence that there is someone up there watching out for them. Group 2 sees it as just pure luck, a happy turn of chance. I'm sure that people in group 2 are looking at those 14 lights in a very suspicious way. For them, the situation is a 50/50...could be bad, could be good. But deep down, they feel that, whatever happens, they're on their own, and that fills them with fear...But there's a whole lot of people in group 1. When they see those 14 lights, they're looking at a miracle. And deep down, they feel that, whatever's going to happen, there will be someone there to help them, and that fills them with hope. What you have to ask yourself is what kind of person are you? Are you the kind that sees signs...sees miracles? Or do you believe that people just get lucky?' Director M. Night Shyamalan verifies that on the DVD commentary when he says: 'Sure, people can say that the title 'Signs' stood for the crop circles, but the main theme and premise of the film consists of Graham's call back to his duty and family through signs. The signs are from God'.