Page:Sun Tzu on The art of war.djvu/229

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  1. 五間之事主必知之知之必在於反間故反間不可不厚也
  2. 昔殷之興也伊摯在夏周之興也呂牙在殷

25. The end and aim of spying in all its five varieties is knowledge of the enemy; and this knowledge can only be derived, in the first instance, from the converted spy. Hence it is essential that the converted spy be treated with the utmost liberality.

26. Of old, the rise of the Yin dynasty was due to I Chih