All warfare is based on deception. Hence, when we are able to attack, we must seem unable; when using our forces, we must appear inactive; when we are near, we must make the enemy believe we are far away; when far away, we must make him believe we are near.

This maxim comes from Sun Tzu’s The Art of War, a Warring States–period Chinese military treatise traditionally dated to the late Spring and Autumn or early Warring States era (roughly 5th–4th century BCE). In the opening chapter, Sun Tzu lays out the strategic fundamentals that precede battle: intelligence, calculation, and shaping an opponent’s perceptions. The line reflects an environment of frequent interstate conflict in which commanders sought advantage through maneuver, feints, and psychological pressure rather than costly frontal engagements. The passage frames deception not as dishonor but as a practical tool for conserving strength, controlling tempo, and forcing the enemy into mistakes.

Sun Tzu argues that victory depends less on brute force than on managing information—what the enemy thinks is happening. By appearing weak when strong, inactive when ready, distant when near (and vice versa), a commander disrupts the opponent’s decision-making, inducing misallocation of troops, premature attacks, or missed opportunities. The deeper claim is that war is a contest of perception and timing: if you can shape the adversary’s expectations, you can choose when and where decisive contact occurs. The quote also implies an ethic of economy—winning by stratagem reduces casualties and preserves resources—making deception a means to an end: control, initiative, and favorable conditions for engagement.

1) “All warfare is based on deception. Therefore, when capable, feign incapacity; when active, inactivity; when near, make it appear that you are far away; when far away, that you are near.”
2) “All war is deception. When we are able to attack, we must seem unable; when using our forces, we must seem inactive; when we are near, we must make the enemy believe we are far away; when far away, we must make him believe we are near.”