What is the theme in Blankets: An Illustrated Novel by Craig Thompson?

Sin is one of the main themes in "Blankets" by Craig Thompson. Craig's family is devoutly religious. His parents often preach about sin and often refer to the Bible to teach the children about it. For Craig, a lot of the issues involving sin are attached to his body, particularly as it grows and changes. Craig immediately attaches shame and self-loathing to hormonal changes and growing up. Part of this comes from his upbringing while part of it comes from being sexually molested as a young boy.