Imagine it is utterly dark. All around you there are voices, some high, some low, some so distant they are mostly if not totally inaudible, others so close you feel like you could reach out and touch them. Each voice contributes in turn, but all together they are one. United. Complete. Beautiful. You raise your voice, too, and in that very same way your own voice is distinguishable, and yet it is part of a bigger whole.