Several of the most shared "Buddha quotes" are not in the early Buddhist texts, including "The mind is everything". The "hot coal" image for anger comes from the Visuddhimagga, a Buddhist treatise written many centuries later, though the early texts do teach that anger harms the angry person first.
Existentialism was never a school the famous names all joined. According to the Stanford Encyclopedia of Philosophy, of the major figures, only Sartre and Beauvoir explicitly called themselves existentialists; Camus denied it, and Kierkegaard died long before the word existed.
Almost everything we know about Diogenes comes from anecdotes written down centuries after he died, mostly by Diogenes Laertius. None of his own writings survive, if he wrote any.
"Et tu, Brute?" is Shakespeare's line. Suetonius and Cassius Dio say he died without a word, and report a Greek phrase, "you too, child?", only as something some people wrote; Plutarch has him cry out, but to Casca, not to Brutus.
"The ends justify the means" is not in The Prince. The nearest passage says that people judge rulers by the outcome and tells a prince to rely on that: advice about how the crowd judges, not a moral rule.
Several tools say less than their popular versions. Hume asked that "a reason should be given" for moving from is to ought; Popper allowed that one counter-example is never enough in practice; Aristotle's mean is "relative to us", and some things have no right amount.
Most famous Nietzsche lines are real but trimmed. "What does not kill me makes me stronger" is about "me", and it sits under the heading "From life's school of war" in a section of barbed one-liners.
Philippa Foot wrote the version everything descends from in 1967, but it was a runaway tram, adapted from a pilot example, in a paper about abortion and the doctrine of double effect. The name "trolley problem" is Judith Jarvis Thomson's.
Fifteen famous lines checked. Six belong to somebody else, two are genuine, and six are real but trimmed or misquoted, including three well-known lines from film and fiction. One is an origin story with no source.
Eight common fears, each with the passage a Stoic wrote about it: book and section, in a translation you can read free, so you can check it in context.
Stoicism began with Zeno of Citium in Athens around 300 BC. Secular mindfulness comes from Buddhist meditation, largely by way of Jon Kabat-Zinn, who founded the Stress Reduction Clinic at the University of Massachusetts Medical School in 1979.
If you are in danger right now, the helplines at the top of this page matter more than anything below them. findahelpline.com lists helplines in more than 175 countries.
Media vita in morte sumus means “in the midst of life we are in death”. It is the first line of a medieval Latin antiphon, a short chant that English service books set at night prayer in the middle of Lent.
“Invictus” is Latin for “unconquered”. It is a sixteen-line poem by William Ernest Henley (1849–1903) that ends “I am the master of my fate: / I am the captain of my soul.”
“Be the change you wish to see in the world” is not in Gandhi's writings. The nearest passage (Indian Opinion, 1913) reads: “If we could change ourselves, the tendencies in the world would also change.”
Ikigai is a Japanese word for something that makes life worth living. In Mogi's account it can be small and private, and it does not have to earn money.
Stoicism was founded in Athens by Zeno of Citium around 300 BC and named after the painted porch where its first teachers met. The three voices most people read are Epictetus, once enslaved; Seneca, Nero's tutor and adviser; and Marcus Aurelius, an emperor writing for himself.