The Stoic writings of the philosopher Seneca offer powerful insights into the art of living, the importance of reason and morality, and continue to provide profound guidance to many through their eloquence, lucidity, and timeless 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.

This selection of Seneca's works was taken from the Penguin Classics edition of Dialogues and Letters, translated by C.D.N. Costa, and includes the essays On the Shortness of Life, Consolation to Helvia, and On Tranquility of Mind.