The Mists of Avalon (Avalon, #1)

by Marion Zimmer Bradley

“Make no oath, Morgaine, lest you pay the penalty of the forsworn . . . none of us knows what the Goddess may demand of us. I too have made the Great Marriage, and my life was forfeit on that day. I live only at the will of the Goddess, and my life is not so sweet that I would begrudge to lay it down,”