A debt should be paid off till the last penny; An enemy should be destroyed without a trace.

Till the enemy's weakness is known, he should be kept on friendly terms.

Even a captured enemy is not to be trusted.

Know your enemy - and learn about his favorite sport.

A single blow must destroy the enemy... without regard of losses... a gigantic all-destroying blow.

Demoralize the enemy from within by surprise, terror, sabotage, assassination. This is the future of war.