Reading the Sima Fa · 04
What Is Harder Than Forming a Battle Line? The Sima Fa on Making Knowledge Act
A commander may know the shape of a formation and still lack an army that can assume it. In three compact steps, the Sima Fa moves from arranging a line to preparing people, employing them, and finally acting on what is known.
A fresh translation
In war, the difficulty is not forming a battle line; the difficulty is making people capable of forming one.
The difficulty is not making them capable of forming a line; the difficulty is making them capable of being employed.
The difficulty is not knowing; the difficulty is putting knowledge into action.
Original text
凡戰：非陳之難，使人可陳難；
非使可陳難，使人可用難；
非知之難，行之難。
Words and concepts
- Formation (陳)
A battle line or ordered disposition of troops. The graph is used in the sense also written 陣. - Make people capable (使人可)
Command and preparation are expressed through people, not through an abstract plan alone. - Be employed (用)
To be usable in the situation at hand. Readiness for one arrangement does not guarantee broader effectiveness. - Know (知)
To understand what should be done. The final contrast separates understanding from performance. - Put into action (行)
To carry out what is known. The line is about execution under military conditions, not a general slogan about personal productivity.
Three difficulties in a descending chain
The passage advances by correction. First, a reader might imagine that the technical problem is constructing a formation. The text shifts the difficulty to the people who must form it. The next sentence refuses to stop there. Troops may be able to stand in formation and still fail to serve the commander’s purpose. The last sentence reaches beneath both problems: knowledge itself does not guarantee action.
Each step removes a visible achievement from the position of final proof. A diagram can be correct. A drill can be completed. An order can be understood. None of those facts alone establishes that an army can respond when circumstances become dangerous and confused.
The movement is therefore not from ignorance to a secret technique. It is from appearance to capacity. The author repeatedly asks what must exist behind the result seen on the field.
A formation is a visible result
A formation can be described by position: units occupy places, intervals are maintained, and front and rear remain distinct. Such order matters. Elsewhere in “Strict Positions,” the Sima Fa pays close attention to ranks, signals, movement, and restraint. Nothing in these three lines dismisses organized deployment.
The first correction concerns where the difficulty lies. A commander does not arrange counters on a board. People must hear an instruction, understand their place, move at the proper moment, and remain with others. The completed line is the end of many acts of attention and obedience.
Looking only at the final geometry can hide those acts. The formation may appear to be a thing that exists by itself. The wording restores the human work beneath it.
Making people able to form ranks
The phrase “make people capable of forming a line” contains more than issuing one command. Ability must have been prepared before the line is needed. Troops require shared signals, practiced movements, and confidence that neighboring groups will respond in a compatible way.
The excerpt does not specify a training schedule. It does, however, distinguish command from mere statement. If an order cannot be performed, repeating it more loudly does not solve the underlying problem. A commander must know what people have actually learned to do.
This emphasis also limits the temptation to celebrate a brilliant plan in isolation. A plan belongs to military practice only when the force entrusted with it can enact its demands. Otherwise it remains a description of movements that no army is yet ready to make.
Ability still is not usefulness
The second sentence makes a sharper distinction. Even the ability to assume formation is not the last test. The harder task is making people “capable of being employed.” This wording widens the problem beyond a single drill.
A unit might reproduce an arrangement on familiar ground and fail when timing, terrain, fear, noise, or unexpected resistance alters the conditions. It may know how to begin but not how to stop, turn, separate, or recover. The text does not list these cases here, yet the difference between formation and employment requires some such gap.
Employment is situational. The question is no longer whether troops can perform a rehearsed shape, but whether their capacity remains available to command in the event that actually occurs.
Knowing is not yet doing
The final sentence is the shortest and widest: knowing is not the difficulty; acting is. Read alone, it could become a proverb about the difference between theory and practice. In its original sequence, it is more exact. “Knowing” comes after formation and employment. It belongs to a chain of military preparation.
A commander may know what disposition is appropriate. Troops may understand their duties. Yet danger changes the cost of action. Noise interrupts signals, fear narrows attention, and urgency encourages premature movement. Knowledge that seemed settled during instruction may not govern conduct at the moment of contact.
The sentence does not say that knowledge is easy or unimportant. Its compressed contrast gives priority to the final test. What matters is whether understanding survives the conditions in which it must be used.
The next words return to human difference
Immediately after the quoted lines, the chapter turns to differences in human character, regional custom, teaching, and transformation. That continuation matters. The difficulty of action is not explained as simple stubbornness or cowardice. People do not enter an army as identical material.
Training forms shared habits, but existing dispositions and customs affect how instruction is received. A commander who wants uniform action must work through variation rather than pretending it has disappeared. The formation is common; the people forming it are not interchangeable.
This context keeps the passage from sounding like a rebuke delivered only after failure. Preparation begins with recognition. Before demanding action, command must create the conditions in which different people can act together.
Why the lesson belongs in “Strict Positions”
The chapter title can sound rigid. “Strict Positions” does contain exacting language about order and control. Yet strictness here is not equivalent to punishing every hesitation. Earlier and later sentences consider fear, cohesion, signals, fatigue, and responsibility.
Within that setting, these three lines explain why a formal position is never enough. Rank has to be inhabited by trained people. Training has to produce usable capacity. Knowledge has to reach action. Strict order depends on preparation at every level.
The passage therefore complicates a simple picture of ancient discipline. The author does not imagine that rules automatically execute themselves. The burden returns to command: can the people placed under an order actually carry it out?
A warning against command by diagram
Readers often meet premodern formations through illustrations, named arrays, or later reconstructions. Those sources can clarify spatial ideas, but the Sima Fa warns against confusing representation with performance. A diagram contains no fatigue, misunderstanding, fear, or delay.
The text’s sequence offers a useful reading discipline. First identify the arrangement. Then ask what people had to know and practice to assume it. Next ask whether that ability could be employed beyond the rehearsal. Finally ask what could prevent knowledge from becoming action.
This does not modernize the passage into management advice. It remains a statement about forming and using troops. Its value for historical reading lies in directing attention from a visible pattern to the institutional and human capacity behind it.
What the three lines do not prove
The excerpt does not reveal a specific formation, drill, or chain of command. It does not rank one regional custom above another, and it does not provide a universal psychology of soldiers. Those subjects would require other evidence.
Nor does “acting is difficult” license the claim that planning or knowledge is secondary. The sequence assumes knowledge. Its concern is the failure to carry knowledge through preparation and into conduct.
What the text does establish is a hierarchy of tests. A formation on paper is not yet a formation made by people. A formation successfully made is not yet a force usable in changing circumstances. Correct knowledge is not yet completed action. The hardest work lies in the transitions.
Source
Sima Fa (司馬法), chapter 4, “Strict Positions” (嚴位), the three-sentence sequence on formation, employment, knowledge, and action. The wording was checked in the Chinese Text Project chapter transcription; that is a typeset text rather than a facsimile. A Japanese woodblock witness is Wang Huan, corrected, Hyōdai Bukei Shichisho Zenbun, books 1–7 (Osaka: Bunkindō, late Edo period). The Sima Fa is book 3. Waseda University Library, call number 文庫31 E1920.