Turn the Enemy's Spies

We must seek out enemy spies who have come to spy on us, bribe them, instruct them, and send them back. Thus converted spies are obtained and used.

Sun Tzu describes turning an opposing agent in an ancient intelligence operation. That practice belongs to warfare and cannot be imported into ordinary relationships. The responsible lesson is to examine provenance: information may be incomplete, interested, or deliberately distorted, so important claims deserve independent confirmation before action.

A converted spy (fan jian) is an enemy agent captured and induced to provide information or misleading reports. Sun Tzu is describing a coercive wartime practice, not a model for trust-building or conflict resolution. The passage assumes rulers who treat information as a weapon and agents as expendable instruments; that historical fact should remain visible when the card is read today. The non-operational lesson is source criticism: ask who supplied a claim, what access they had, what interests may shape it, and whether another reliable source confirms it. A source can be sincere and still be mistaken, or accurate in one area and uninformed in another. Compare claims with evidence that was obtained lawfully and with the knowledge of the people involved. The modern boundary matters—do not deceive, coerce, impersonate, recruit hidden intermediaries, or obtain private information in the name of verification. When trust is damaged, transparent clarification is safer than counter-manipulation. Good judgment does not require becoming an intelligence operative; it requires knowing what you know and what you do not. The converted spy is valuable in the text precisely because war treats information as a weapon. That is a warning as much as a technique. In a non-military setting, the safer practice is to make provenance visible, invite correction, and refuse information obtained through deception or coercion even when it appears useful.