Passage 6-17
故形兵之極, 至於無形; 無形, 則深間不能窺, 智者不能謀.
The ultimate in deployment is to be formless. Formless, even deep spies cannot detect you, and the wisest cannot plot against you.
"Water shapes its course according to the nature of the ground." Strategy as adaptive flow — the antithesis of rigid doctrine.
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These passages from other chapters connect to the themes in Passage 6-17:
The Way of Deception
Passage 1-12
兵者, 詭道也. 故能而示之不能, 用而示之不用, 近而視之...
Shifting Position Unpredictably
Passage 11-25
易其事, 革其謀, 使人無識, 易其居, 迂其途, 使人不得...
Exploiting Unpreparedness
Passage 1-14
攻其無備, 出其不意, 此兵家之勝, 不可先傳也.
Five Types of Spies
Passage 13-4
故用間有五: 有鄕間, 有內間, 有反間, 有死間, 有生間...
Sealing Enemy's Plans
Passage 11-36
先其所愛, 微與之期, 賤墨隨敵, 以決戰事. 是故始如處女...
Manipulating Appearances
Passage 1-13
利而誘之, 亂而取之, 實而備之, 强而避之, 怒而橈之, ...