What are the motifs in Swan Song by Robert McCammon?

Each character has a strong sense of destiny wound throughout the novel. Though Swan begins timid, young, and terrified, she grows into a pure and strong leader who helps continue all that is good about the human race. Though Roland is a smart, somewhat disturbed little boy, by throwing his lot in with Macklin, he promises his future will be dark. Josh feels guilt over losing communication with his family, but is destined to find Swan and Glory and make them his new family.