When the soldiers stand leaning on their spears, they are faint from want of food.

Spies cannot be usefully employed without a certain intuitive sagacity.

From a position of this sort, if the enemy is unprepared, you may sally forth and defeat him. But if the enemy is prepared for your coming, and you fail to defeat him, then, return being impossible, disaster will ensue.

On the field of battle, the spoken word does not carry far enough; hence the institution of gongs and drums... banners and flags. Gongs and drums, banners and flags, are means whereby the ears and eyes of the host may be focused on one particular point.

Nothing is more difficult than the art of maneuvering for advantageous positions.

The rising of birds in their flight is the sign of an ambuscade. Startled beasts indicate that a sudden attack is coming.

Opportunities increase as they are taken.