I'm sure Obama is an atheist, I'm sure Kennedy was an atheist, but I doubt if Pope Frank is. - Richard Dawkins

But failure to disprove something is not a good reason to believe it.

Reason has built the modern world. It is a precious but also a fragile thing, which can be corroded by apparently harmless irrationality. We must favor verifiable evidence over private feeling. Otherwise we leave ourselves vulnerable to those who would obscure the truth.

There is something infantile in the presumption that somebody else (parents in the case of children, God in the case of adults) has a responsibility to give your life meaning and point. . . . The truly adult view, by contrast, is that our life is as meaningful, as full and as wonderful as we choose to make it. And we can make it very wonderful indeed.