A ruler who governs only by what he can see from his throne is already half-blind. Valluvar opens this chapter with a startling metaphor — spies are not instruments of the state but organs of the king's body, his literal eyes — and then proceeds to build an entire theory of statecraft on the premise that the most important political skill is the ability to know what no one wants you to know. What follows is not an abstract treatise on intelligence but an operational manual: who the spy watches, what disguise he wears, what quality of nerve he must possess, and — most dangerously — how the king must verify what his own eyes report. By the chapter's end, the ruler who began by deploying agents discovers that he is the one under the most exacting surveillance: his own judgment, tested three times over, must prove equal to the secrets his spies deliver. The chapter's deepest provocation is that even the king's trust must be spied upon.