Stoicism was a school of ancient Greek philosophy founded in Athens around 300 BCE. It spread to Rome and produced three writers whose work survives in enough quantity to read today: Marcus Aurelius, emperor and private journal-keeper; Epictetus, a former slave who became a celebrated teacher; and Seneca, a Roman statesman and playwright. Their words are quoted constantly, often without their original context — which is a shame, because the context usually makes them more interesting.
Marcus Aurelius
“You have power over your mind — not outside events. Realise this, and you will find strength.” This is one of the most-shared Stoic quotes online, and it is a reasonable paraphrase of ideas found throughout the “Meditations” — a private journal not intended for publication. Aurelius wrote it to remind himself, not to instruct others. The “Meditations” are full of self-directed commands and questions. Reading it as a personal document changes its character: this is a man trying to live up to principles he believed in, often failing, writing notes to prod himself back on track.
“The impediment to action advances action. What stands in the way becomes the way.” This appears in Book 5 of the “Meditations.” The idea is that obstacles are not interruptions to progress — they are the material of progress. Stoics held that external events are indifferent; what matters is how we respond. The obstacle teaches the response.
Epictetus
“Make the best use of what is in your power, and take the rest as it happens.” This is from the “Enchiridion” (Handbook), a condensed version of his teachings compiled by his student Arrian. Epictetus was explicit about what is and is not in our power: our judgments, our desires, our actions are ours; our body, our reputation, our external circumstances are not. This dichotomy is the core of Stoic practice.
“Seek not that the things which happen should happen as you wish; but wish the things which happen to be as they are, and you will have a tranquil flow of life.” This is from the “Discourses.” It is not passive resignation — Epictetus was clear that we should act — but it is a prescription against the suffering caused by demanding reality match our preferences.
Seneca
“We suffer more often in imagination than in reality.” From his “Letters to Lucilius,” Letter 13. Seneca was writing to his friend Lucilius about anxiety and worry. His point was that anticipatory dread is frequently worse than the actual event — and that much of what we fear never materialises. The modern version of this idea (often miscredited to Mark Twain) is essentially Seneca’s argument.
“Omnia aliena sunt, tempus tantum nostrum est” — “Everything else belongs to others; time alone is ours.” From “On the Shortness of Life.” Seneca’s treatise on time is one of the most readable pieces of ancient philosophy. His argument: life is not short, but we waste it. People protect their money carefully but give their time to anyone who asks for it.
What Stoicism Actually Is
Stoicism is not about suppressing emotion or enduring suffering without complaint. It is a practical philosophy for living well under conditions we cannot fully control. The Stoics believed virtue — practical wisdom, justice, courage, temperance — was the only true good. Everything else was “preferred indifferent” — worth pursuing or avoiding, but not the source of genuine wellbeing. Understanding this context makes the quotes make more sense, and more demanding sense at that.