Unresolved issues, anger, and resentments can make even a small affront feel huge. The world is full of teachers if we are willing to learn from them, and sometimes the best lessons come from ordinary people with a simple metaphor. One teacher described how a little cut can sting sharply when lemon juice touches it, and that image makes the point perfectly. It is not the lemon itself that hurts, but the wound underneath. Sometimes the lesson arrives in the plainest language possible.