Accurate self-knowledge and enemy-knowledge determine outcomes: know both to be secure, know one to trade victories and defeats, know neither to be defeated always.

By Sun Tzu, from L'Art de la guerre

Key Arguments

  • He presents a three-part maxim linking degrees of knowledge to predictable results across battles.

Source Quotes

18. Hence the saying: If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat.
Hence the saying: If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle.
If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle.

Key Concepts

  • Hence the saying: If you know the enemy and know yourself, you need not fear the result of a hundred battles.
  • If you know yourself but not the enemy, for every victory gained you will also suffer a defeat.
  • If you know neither the enemy nor yourself, you will succumb in every battle.

Context

iii. Attack by Stratagem (lines 177–227)