Maybe it is as simple as - we need to believe in something. Maybe we need to believe there is something more to life than life. Maybe we need to believe that we are more than the sum of our parts. Maybe we need to believe that we exist for more than a handful of decades.
What would you rather believe? That there is a God and an over all plan. Or that you spend 100 years getting up everyday so that you can work, eat and sleep and then in the end you simply die. I will take the plan any day.
I do believe in God - because I choose to believe in God. I would rather have blind faith in something than no faith at all. Beside it keeps me honest. It is much easier for me to be the person I want to be if I think that someone is watching.