We may not need God to tell us where the world came from, but we need God to be able to live moral lives and for there to be morality in the first place.
Participation in the collective life of the polis both restrains the extraordinary individual and enlarges the ordinary individual, allowing him to participate in the extraordinary. An individual can achieve participatory excellence via the accomplishments of the polis and need not always be caught up in the agnostic struggle to outdo his peers.
I think the humanities always have to take science, our great knowledge that we get from science, into account, but then try to answer the human questions and try to make sense out of our lives, taking into account all of the scientific knowledge.
For the ancient Greeks, who lacked our social media, the only way to achieve mass duplication of the details of one's life in the apprehension of others was to do something wondrously worth the telling. Our wondrous technologies might just save us all the personal bother. Kleos is a tweak away.