Timeless advice on the art of living well, from the celebrated Penguin Great Ideas series The writings of the ancient Roman philosopher Seneca offer powerful insights into stoicism, morality and the importance of reason, and continue to provide profound guidance to many through their eloquence, lucidity and wisdom. Throughout history, some books have changed the world. They have transformed the way we see ourselves - and each other. They have inspired debate, dissent, war and revolution. They have enlightened, outraged, provoked and comforted. They have enriched lives - and destroyed them.