I honestly don't understand how anyone can say there is no God!!! The evidence of God's existence is all around us and in fact WE are evidence ourselves! Nothing just happens out of nothing and for no reason. Many I believe are too scared to admit there is a God because it is intimidating to think there is a higher power who we will have to be accountable to for all we have done in this life. Plus many don't want to believe because they want to continue to live a sinful life style with "no consequences". Believers are by no means perfect but we are forgiven. As a result of God's mercy and goodness, we make an effort to live a better life and bring glory to him but we know even if we mess up from time to time he forgives us and helps us get back up and try again. Unbelievers think they can live life the way they please and not worry about answering to anyone but they refuse to see that they will answer to God one day and it will be too late and they will be in Hell for rejecting Jesus as their savior! No one will be able to say "I didn't know" because this day and age there is little excuse for not knowing unless you live in a remote part of the world. Those who seriously do not know will not be punished for not knowing but will be punished for going against what they inherently know is right which is called the conscience which is the voice of God. So, they will be judged based on that.