Tell us about a book or comic that taught you an important life lesson!

While we all hope for entertainment and perhaps a little escapism from a good book or comic, truly great writing can teach us important lessons for life. Shakespeare, for instance, cautioned against such character flaws as ambition, jealousy, and hesitancy by showing us tragic heroes brought low by them.

For this bounty, we'd like you to tell us about a book or comic that taught you what you consider to be an important life lesson that's stuck with you ever since. Tell us about the story and its author, tell us about the lesson and how it was conveyed, and tell us why it's stuck with you and how you follow it in daily life.