King's Kung-Fu& Tai Chi

Art of War 13.20

The Art of War (孫子兵法), The Use Of Spies 用間篇

凡軍之所欲擊城之所欲攻人之所欲殺必先知其守將左右謁者門者舍人之姓名令吾間必索知之

Whether the object be to crush an army, to storm a city, or to assassinate an individual, it is always necessary to begin by finding out the names of the attendants,

the aides-de-camp,

the door-keepers and sentries

of the general in command.

Our spies must be commissioned to ascertain these.

Lionel Giles (1910), Sun Tzŭ on the Art of War (1910), with Giles' notes — public domain.

Lionel Giles's notes

左右 is a comprehensive term for those who wait on others, servants and retainers generally. Capt. Calthrop is hardly happy in rendering

it “right-hand men.”

謁者, literally “visitors,” is equivalent, as Tu Yu says, to 主告事者 “those whose duty it is to keep the general supplied with information,” which naturally necessitates frequent interviews with him. Chang Yü goes too far afield for an explanation in saying that they are 典賓客之將 “the leaders of mercenary troops”.

閽吏 and 守舍之人.

守將, according to Chang Yü, is simply 守官任職之將 “a general on active service.” Capt. Calthrop is wrong, I think, in making 守將 directly dependent on 姓名 (...“the names of the general in charge,” etc.).

As the first step, no doubt, towards finding out if any of these important functionaries can be won over by bribery. Capt. Calthrop blunders badly with: “Then set the spies to watch them.”

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Data: English Wikisource (Public domain texts; transcription CC BY-SA 4.0). Retrieved 2026-10-22.