Chapter 5: Energy
From Sun Tzu’s The Art of War (Lionel Giles translation, 1910).
On the use of force and alignment. Sun Tzu contrasts the direct and the indirect (ch’i and cheng), and compares a well-led army to a whetted stone or a drawn bow — small effort, concentrated effect.
Key principles
- Combine the direct and the indirect to produce inexhaustible variety.
- Concentrate strength at the point of decision; never spread it evenly.
- Good order lets a small force act like a great one.
Quotations from this chapter
Drawn from our sourced lesson database — each links to its permanent page with the full interpretation.
“The quality of decision is like the well-timed swoop of a falcon which enables it to strike and destroy its victim.”
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“The control of a large force is the same in principle as the control of a few men: it is merely a question of dividing up their numbers.”
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“The control of a large army is nowise different from a small one: it is a question of instituting signs and signals.”
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“In all fighting, the direct method may be used for joining battle, but indirect methods will be needed in order to secure victory.”
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“Indirect tactics, efficiently applied, are inexhaustible as Heaven and Earth, unending as the flow of rivers.”
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Modern applications
- Focus your effort on one decisive front instead of many weak ones.
- Set up systems so that ordinary effort produces outsized results.
Related strategy topics
Sun Tzu on TimingSun Tzu on Decision-MakingSun Tzu on LeadershipSun Tzu for BusinessSun Tzu on CompetitionSun Tzu on PositioningSun Tzu on Negotiation
Frequently asked questions
What does Sun Tzu mean by “energy” in Chapter 5?
He means the release of accumulated force at the right moment — like a bow drawn and loosed. The chapter teaches mixing the direct and indirect approaches so your actions are unpredictable yet decisive.