I believe because life is to beautiful to be made by an accident. When I'm out 15 miles in the woods on my bike, looking over creation, the beauty of it makes me know that this is not an accident. When I see my kids running around the yard, laughing and screaming, I know that this is not an accident. When I pray for strength, and I get it, I know that this is not an accident. My proof doesn't have to be proof at all. I have faith, and it has made my life all the more worthwhile.