Discourses by Epictetus is a collection of philosophical teachings based on his lectures, recorded by his student Arrian. The book explores Stoic ideas about how to live a good life, emphasizing self-control and resilience and focusing on what we can control rather than worrying about what we can't. Epictetus argues that happiness comes from within, not from external things like wealth or status, and that true freedom comes from mastering our own thoughts and emotions. Through practical advice and real-life examples, Discourses encourages readers to accept hardships with courage, act with integrity, and stay calm in the face of challenges.