Some ideas are so powerful they echo through centuries, offering guidance and clarity long after they were first written down. This is certainly true for many classic philosophy texts. While they were created in ancient or early modern times, their core questions about justice, happiness, and knowledge are just as important today as they were then.

If you’re looking to connect with some of the most influential ideas in history, we’ve got you covered. Here are a few timeless philosophical works that continue to shape how we think about our world and ourselves.

The Republic by Plato

Plato’s The Republic is one of the most famous philosophical texts ever written, and for good reason. At its heart, it asks a huge question: What is justice, and is a just life better than an unjust one? To answer this, Plato imagines an ideal city, exploring everything from leadership and education to the nature of reality itself.

Why it’s still relevant: Have you ever wondered what makes a society fair? Or what qualities a good leader should have? Plato’s ideas on philosopher-kings—rulers who are wise and virtuous—still fuel discussions about leadership and governance. His famous Allegory of the Cave, which explores the difference between appearance and reality, encourages us to question our assumptions and seek deeper truths, a skill that's incredibly valuable in our complex world.

Nicomachean Ethics by Aristotle

What does it mean to live a good life? This is the central question of Aristotle’s Nicomachean Ethics. For Aristotle, the ultimate goal is "eudaimonia," a state often translated as happiness or human flourishing. He believed this is achieved not through momentary pleasure, but by living a life of virtue and reason.

Why it’s still relevant: Aristotle gives practical advice on developing virtues like courage, generosity, and honesty. His concept of the "golden mean"—the idea that virtue is a balance between two extremes (for example, courage is the mean between recklessness and cowardice)—is a powerful tool for self-improvement. It encourages us to find moderation in our actions and build a character we can be proud of. It’s a timeless guide to becoming a better person.

Meditations by Marcus Aurelius

Written not for an audience but as a personal journal, Meditations is a collection of reflections from the Roman Emperor Marcus Aurelius. It is one of the foundational texts of Stoicism, a philosophy focused on finding peace by accepting what we cannot change and focusing our energy on what we can control: our own thoughts and actions.

Why it’s still relevant: In a world filled with constant stress and uncertainty, Stoicism offers a path to resilience. Marcus Aurelius reminds us that external events don't have to disturb our inner peace. When you’re stuck in traffic or dealing with a difficult coworker, his advice to remain calm and act with reason is as practical today as it was nearly two thousand years ago. It’s a guide to building mental strength and navigating life’s challenges with grace.

Meditations on First Philosophy by René Descartes

"I think, therefore I am." This famous line comes from René Descartes, a philosopher who decided to doubt everything he thought he knew in order to find certain, unshakable truths. His Meditations on First Philosophy is a journey into radical doubt, questioning the reliability of our senses and even our own existence before building knowledge back up from a solid foundation.

Why it’s still relevant: Descartes’ work is a masterclass in critical thinking. It teaches us the importance of questioning our beliefs and not taking things at face value. In an age of misinformation, the ability to think critically and distinguish fact from opinion is more important than ever. This book challenges you to think for yourself and build your understanding of the world on solid ground.