A saying is any concise expression that is especially memorable because of its meaning or style. Sayings are categorized as follows:

• Aphorism: a general, observational truth; "a pithy expression of wisdom or truth".
  • Adage, proverb, or saw: a widely known or popular aphorism that has gained credibility by long use or tradition.
  • Apothegm/Apophthegm: "an edgy, more cynical aphorism; such as, 'Men are generally more careful of the breed of their horses and dogs than of their children.'"
• Axiom: a proposition that commends itself to general acceptance; a well-established or universally conceded principle; a maxim, rule, or law.
• Cliché or bromide: an unoriginal and overused saying.
  • Platitude: a cliché that is unsuccessfully presented as though it were meaningful, original, or effective.
• Epigram: a clever and often poetic written saying that comments on a specific person, idea, or thing; it especially denominates such a saying that is conspicuously put at the beginning of a text.
• Epitaph: a saying in honor of a decedent, often engraved on a headstone or plaque.
• Epithet: a descriptive word or saying already widely associated with a specific person, idea, or thing.
• Idiom, idiomatic phrase or, phraseme: a saying that has only a non-literal interpretation; "an expression whose meaning can't be derived simply by hearing it, such as 'kick the bucket.'"
  • Four-character idiom:
    • Chengyu: Chinese four-character idioms
    • Sajaseong-eo: Korean form of four-character idioms
    • Yojijukugo: Japanese form of four-character idioms
• Mantra: a religious, mystical, or other spiritual saying that is repeated, for example, in meditation.
• Maxim: (1) an instructional expression of a general principle or rule of morality or (2) simply a synonym for "aphorism"; they include:
  • Brocard
  • Gnome
  • Legal maxim
• Motto: a saying used frequently by a person or group to summarize its general mission.
  • Credo: a motto implicitly or explicitly extended to express a larger belief system.
  • Slogan: a motto with the goal of persuading.
• Quip: a clever or humorous saying based on an observation.
• Witticism: a saying that is clever and usually humorous and that is notable for its form or style just as much as, or more than, its meaning.