This is a famous saying by the Greek writer Plutarch, who quoted this famous saying in "The Life of Solon".

The following is a relevant introduction to Plutarch:

Plutarch (Greek: Πλο?ταρχο?; Latin: Plutarchus, about AD 46-120) A Greek writer, philosopher, and historian during the Roman Empire, he was famous for his book "Comparative Biographies" (also known as "Biographies of Greek and Roman Celebrities" or "Biographies of Greek and Roman Heroes"). .

His works were very popular during the Renaissance. Montaigne admired him highly, and many of Shakespeare's plays were based on his records.

Plutarch was born into an educated family in the city of Chaeronea in the Boeotian region of central Greece. He inherited court training at an early age and developed a taste for knowledge. In his youth, he traveled to Athens and studied under the famous teacher Ammonius, receiving training in mathematics, philosophy, rhetoric, history and medicine.

The above information refers to Baidu Encyclopedia - Plutarch