The belief in a Creator is a fundamental part of what makes us human beings. To believe in God (be it under the banner of Christianity, Islam, Judaism etc.) gives us meaning and a reason to live. Without faith we would fail to understand what it is to be human. A much respected friend of mine once said that:

“To be without faith is to be like a dog without a leash - just another angry animal on his way to the abatoir of damnation.”