"To me, religion is "how we live in relationship to ourselves, each other, and the world around us." Our Theology(ies), giving meaning to this relationship, can come from many sources, and in UU it is encouraged to involve a rational and intuitive account of a broad range of "religious, philosophical and scientific thought," giving us the breadth and depth of human experience to draw upon. I find however, that humanism is a broadly central theme to much of religious and philosophical thought (even mysticism) that eventually feeds our religious fulfillment of, at least, our 7 Principles."
There, quickly done and probably not nearly as precise as I would like, but a start.
Peace, and inquiry!