Words on the wall
When people speak of the “wisdom of Delphi”, they usually mean a handful of short sayings. The best known are “Know thyself” and “Nothing in excess”. The travel writer Pausanias, in the second century CE, says that such sayings were inscribed in the forecourt of the temple of Apollo, and he mentions a third, often translated as “Make a pledge and trouble is near”. Other ancient authors discuss them as well, though no complete original inscription survives from the classical temple.
It is worth being careful about the claim that the oracle “taught” these ideas. The sayings were displayed at the sanctuary, and Greeks associated them with Apollo, but they were not predictions delivered by the Pythia. They were closer to inscriptions that visitors read as they approached the shrine.
Who said them first?
Greek tradition did not credit the maxims to the god alone. Plato’s dialogue Protagoras says that the Seven Sages, a group of early wise men, gathered at Delphi and dedicated sayings such as these as a first fruit of their wisdom. Lists of the Seven Sages differ between authors, and names such as Thales, Solon and Chilon of Sparta appear in various versions. Individual sayings were credited to different sages in different sources, so the attribution is best treated as tradition rather than as historical fact.
This tradition matters because it links the maxims with the age of early law-givers and thinkers. A saying like “Nothing in excess” fits the interest in measure and moderation found in the age of the Solon reforms at Athens, and it fits into the long Greek discussion of limits. It also resonates with the later doctrine of the mean, associated with Aristotle, though the sayings are much older and shorter than any philosophical theory.
Know thyself
The phrase “Know thyself” is often read today as an invitation to introspection, but its original meaning is debated. Many scholars think it first meant something closer to “know your limits”: remember you are a mortal, not a god. That reading suits a setting where visitors were about to approach a divine oracle and were meant to show humility.
Later thinkers expanded it. In Plato’s dialogues, Socrates uses the idea in conversation, and the inscription becomes a starting point for questioning what people claim to know. This development belongs to the story of Plato and Aristotle and their teachers, and it shows how philosophers adopted a religious slogan for new purposes. Later Stoic virtue ethics used similar language about self-examination, and in this way “Know thyself” became a standard line in European moral thought.
Nothing in excess
“Nothing in excess” is a simple call for moderation, and it was easy to apply to many fields: wealth, anger, pleasure, ambition. Greek poets and historians often tell stories where excessive pride brings a fall, and the saying matched that outlook. A consistent theme in the stories told about Delphi is that prosperity does not justify arrogance toward the gods or other people.
A saying that travelled
One of the best pieces of evidence that these maxims circulated widely comes from far to the east. At Ai Khanoum, a Greek city in what is now northern Afghanistan, excavators found a base carrying an inscription by a man named Clearchus. It says he copied wise sayings from Delphi and set them up in the shrine of the city’s founder. The inscription is usually dated to the third century BCE. It shows that Greek settlers far from home valued the sayings as a link to the old country, which is useful evidence because it is a contemporary document rather than a later literary report.
Guidance on conduct and daily life
Apart from the inscriptions, Delphi gave advice on matters of religion and behaviour. Greek cities often asked the oracle what rites to perform, which gods to honour or how to purify a person who had committed a killing. The answer might be to set up a cult, change a sacrifice or make an offering, so Delphi acted as a kind of reference point for religious practice. This is a more modest picture than that of an oracle that predicted the future.
Individuals also asked about personal matters. The evidence for this is stronger at Dodona, where many small lead tablets with private questions survive, than at Delphi, where much of the record comes from literary anecdotes. Typical questions in anecdotes concern marriage, travel, health, farming and whether to start a business, but the details of any particular story should be treated with caution.
Why the sayings lasted
The Delphic maxims were short, easy to memorise and easy to attach to different philosophies. Their authority did not depend on a particular theory, only on the prestige of the sanctuary. That is probably why they travelled so far and survived the end of the oracle itself. They remain a good example of how a religious site could shape ethical language without issuing laws.