All men put faith in something whether they know it or not. When man does not have a religion, he subconsciously creates one. In the West, we have worship of the government. If you take the role of an atheist, you put your faith into science. That being that evolution lead to our creation. It requires a lot of faith to believe in the flimsy science to back up the evolution theory. Let's say that you just don't believe anything at all. We just exist for no reason at all and it's a fluke, well, you will end up creating a system of believe that may not even be obvious to you.