I’d say try and find the best art, the best writing and the best music that’s come out of the religious context and ask where does it come from?
It doesn’t come from nowhere: so the poetry of a George Herbert or a T.S. Eliot, the art of a Rembrandt, the music of a Bach or Mozart, or even, Arvo Pärt, or modern composers. That’s the world that religion helps to create, and I think I’d just say: ask whether that’s a bigger or a smaller world, a richer or a poorer world and start from there.
++Rowan here offers a generous invitation to non-believers, skeptics, and atheists not only to imagine what the world would be like if the best of religious contributions to history and culture had never taken place, but also to ask: If there is genuine beauty in the contributions of religious persons to this world, and if the moral values of love, compassion, and respect for the dignity of all persons promoted by religion are worth embracing, could it be that these are "echoes of a voice" or signs that point to the reality of God? That strikes me as a civil and respectful approach to apologetics and evangelism.