I used to be a hardcore atheist. The scientific explanations offered through cosmology and evolutionary biology make much more sense to me than the folkloric creation myths which pass as "truth" for billions of people.

But there's a point at which scientific explanations no longer work. For me, that point comes when one ponders the nature of human consciousness. Attempting to understand what it truly means to be a conscious human being by using science alone just doesn't work. It makes more sense to me to believe that human consciousness is, in some way, a manifestation of something larger. Some people choose to call it "God", I choose not to. I don't try to define it, I don't worship it or pray to it, and I don't think of it as a moral compass beyond a general feeling that if each of us is a part of it, we should treat each other as such.