The Little Book of Stoicism

Stoicism is a practical guide to living a happy and resilient life by focusing on what you can control and choosing your response to everything else.

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Author:Jonas Salzgeber

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Life is full of surprises, and not all of them are pleasant. One day things might be going perfectly, and the next, a single unexpected event can make you feel angry, anxious, or defeated. We often react to these moments without thinking, letting our emotions take over. But what if there was a way to face life’s challenges with a calm and steady mind? What if you could use those challenges to become a stronger, better person? This is the central promise of Stoicism, an ancient philosophy that is as relevant today as it was thousands of years ago in Greece and Rome. Stoicism is not an abstract set of ideas for academics; it is a practical toolkit for living a good life. It is an art form where the material you work with is your own life, and your goal is to shape it into something meaningful and beautiful.

The philosophy of Stoicism makes two major promises to those who practice it. The first is that it can guide you toward a happy life that flows smoothly. The Stoics called this state eudaimonia, which can be translated as living in harmony with your best self. They believed that every person has a “divine spark” or a higher self within them. By living in a way that honors this inner spirit—by being kind, wise, and courageous—you can achieve a state of genuine thriving. This isn’t about fleeting pleasure, but a deeper sense of fulfillment and purpose that comes from knowing you are living well and acting rightly.

The second promise is that Stoicism can teach you how to be emotionally resilient. Life will never be free of problems. People will disappoint you, plans will fail, and unexpected hardships will arise. The Stoic approach is not to pretend these things don’t happen, but to train your mind so that they don’t have the power to destroy your inner peace. This is a common misunderstanding of Stoicism; it is not about suppressing your emotions or becoming a robot without feelings. It is perfectly normal to feel a flash of anger or a moment of fear. The goal is to tame these emotions, to acknowledge them without letting them control your actions. Through consistent practice, you can build a mind that is like a deeply-rooted tree, capable of withstanding any storm without breaking.

A simple way to understand the core teachings of Stoicism is through a model called the “Stoic Happiness Triangle.” At the center of this triangle is the ultimate goal: eudaimonia, or a well-lived life. The three points of the triangle represent the core principles you must practice to achieve that goal. The first principle is to “live with arete.” The Greek word arete means excellence or virtue. It is the idea that in every situation, you should strive to express the best version of yourself. It means using reason to make wise decisions, acting with courage when you are afraid, and treating others with justice and fairness. It is a constant commitment to doing the right thing.

The second, and perhaps most famous, principle is to “focus on what you control.” So many of our anxieties come from worrying about things that are completely out of our hands—what other people think, whether it will rain tomorrow, or if we will get stuck in traffic. The Stoics teach that these external events are irrelevant to our happiness. The only things we truly have control over are our own thoughts, judgments, and actions. By focusing our energy exclusively on making good choices within our own sphere of control, we can find peace regardless of our external circumstances. The third principle is to “take responsibility.” This means understanding that events themselves are not what hurt us, but our interpretation of those events. If someone insults you, the words themselves have no power. It is your judgment that the words are “bad” or “hurtful” that causes you pain. When you realize that you are the one in charge of your own feelings, you become incredibly free. External events can no longer harm you unless you allow them to.

Understanding the theory is one thing, but Stoicism is all about action. To make it a part of your life, you can adopt simple daily routines. For example, your morning can be a time to prepare for the day ahead. You could follow the advice of the Roman emperor Marcus Aurelius and mentally prepare yourself to encounter difficult or unpleasant people. By anticipating these challenges, you are less likely to be surprised or angered by them when they happen. Alternatively, you could start the day by reflecting on the simple privilege of being alive—the ability to breathe, think, and love. Reminding yourself of the temporary nature of life can fill you with gratitude.

Similarly, the evening is a perfect time for self-reflection. The philosopher Seneca suggested asking yourself questions each night, such as, “What bad habit did I overcome today?” or “How did I act when I was faced with a challenge?” By reviewing your day without harsh judgment, you can identify areas for improvement. Perhaps you lost your temper in traffic. By reflecting on it, you are more likely to remember to stay calm the next time it happens. This isn’t about achieving perfection overnight, but about making small, gradual improvements every single day. The focus is always on what you can control: your own character and your own actions.

To build true emotional resilience, the Stoics recommended exercises that train your mind for hardship, much like a soldier trains during peacetime. One powerful technique is “negative visualization.” Before starting a new project or even going on a trip, take a moment to think about everything that could possibly go wrong. Your flight could be canceled, you could lose your wallet, or the project could fail. The point isn’t to become a pessimist, but to mentally prepare yourself for any outcome. If something does go wrong, it won’t be a shock, and you will be able to handle it with a calm and logical mind.

Another exercise is “voluntary discomfort.” This involves deliberately putting yourself in uncomfortable situations to build your tolerance for hardship. You could try living on a very tight budget for a week, taking cold showers, or sleeping on the floor for a night. These small acts of self-discipline teach you that you can endure far more than you think. They also have the wonderful side effect of making you deeply appreciate the comforts you normally take for granted. Finally, the Stoics believed it was essential to contemplate your own death. This is not meant to be morbid. Instead, remembering that your time is limited is a powerful tool to help you appreciate the present moment. It strips away trivial worries and forces you to focus on what is truly important. When you live each day as if it could be your last, you stop wasting time and start living a life of purpose and meaning. By integrating these practices into your daily life, Stoicism becomes more than a philosophy—it becomes a pathway to a stronger, happier, and more virtuous you.

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