What is the theme in The Norse Myths by Kevin Crossley-Holland?

Another theme is Immovable Fate. Fate is not expressly addressed in any of the myths. In Myth 4 when Odin sacrifices himself to himself mention is made of the Norns who measure out the life of a man on the day he is born. Other than this brief mention of how a man's life is structured, fate is not addressed. However, fate is a very important concept in Scandinavian culture. Before the advent of Christianity and the hope of a better life after death, the Norse people believed that the position into which a man was born was fixed and that there was nothing he could do to alter the course of events in his life.