When you know both yourself as well as your competition, you are never in danger. To know yourself and not others, gives you half a chance of winning. Knowing neither yourself or your competition puts you in a position to lose.
Sun TzuConfront them with annihilation, and they will then survive; plunge them into a deadly situation, and they will then live. When people fall into danger, they are then able to strive for victory.
Sun TzuThe dance of battle is always played to the same impatient rhythm. What begins in a surge of violent motion is always reduced to the perfectly still.
Sun Tzu