This is an aphorism from Yue Fei (1103-1142), a prominent general of the Song Dynasty. In his theory of warfare, a central concept is the subjective role the front line commander plays in the flexible deployment of tactics. While the general principles and laws of war always apply, it is also necessary to respect the individual initiative of the commander on the battlefield. His abilities to adapt to the situation on the ground, take appropriate decisions, deal with changing situations and employ flexible tactics are all primary guarantees of maintaining the initiative in a conflict.

Yue Fei said, “To place troops in formations before engaging in action is a general principle of warfare. However, the skillful use of tactics depends on the thinking and judgment of the commander.” (The History of the Song Dynasty)