"Hence that general is skilful in attack whose opponent does not know what to defend; and he is skilful in defense whose opponent does not know what to attack"

This quote by Sun Tzu talks to the value of method in warfare. Sun Tzu is recommending that a basic is most effective when they can expect their challenger's moves and use that understanding to their advantage. A general who can expect their opponent's moves can use that knowledge to attack in locations where their opponent is unprepared and defend in locations where their challenger is unable to attack. This quote stresses the importance of having a mutual understanding of the opponent's technique and having the ability to anticipate their moves. Sun Tzu is suggesting that a general who can expect their opponent's moves will achieve success in both attack and defense. By comprehending the enemy's strategy, a general can use their understanding to their benefit and get an edge in battle. Sun Tzu's quote is a tip that method is key to success in warfare and that a basic should have the ability to expect their opponent's relocations in order to be successful.