For a good deal of my life, I struggled with the concepts of my beliefs with both religion and God. When I was younger, I did believe in God, but I never attended church nor read the bible.
It was after George Bush invaded the Middle-East, however, that my belief changed. When Bush said that God told him to go to war, I asked myself, "What kind of God tells people to go to war, and kill people?" It was this question that turned me into an agnostic. It was this transformation that also led me to have full faith in science.
Ironically enough, however, it was this belief in science that allowed me to rediscover God. Think about it: we are a singular being on a planet, a planet in a galaxy, a galaxy in a universe, and a universe within a multi-verse. Beyond that...who knows? Alternate realities, alternate dimensions? It is very well possible. Therefore, for people to say there is no God just doesn't make any sense. Yes, there's no evidence right now, but that doesn't mean existence can be proved false. Remember, it took thousands of years before Newton, one of the greatest minds in history (and a believer in God by the way) discovered gravity. Evidence exists, it just takes a clear mind, and a strong heart to find it.
The one thing I do not believe in, however, is religion. Religion is nothing more than a poison. Religion tries to control people with the idea that they will be damned in hell if they do not attend church, and that unless they follow everything they say, God will punish them. Religion keeps people from finding the answers in the realm of nature and science. I believe that God has given us the answers, but he has given the answers in the world around us, and not in a book that not only has different opinions, but different forms as well.
If you are religious, let me say this: I respect you as an individual and as a human being, but I will question your beliefs.