The business of the general is quiet and secret, fair and orderly.
To assemble armies and put them into dangerous situations is the business of generals. Adaptations to different grounds, advantages of contraction and expansion, patterns of human feelings and conditions—these must be examined.
A government should not mobilize an army out of anger, military leaders should not provoke war out of wrath. Act when it is beneficial, desist if it is not. Anger can revert to joy, wrath can revert to delight, but a nation destroyed cannot be restored to existence, and the dead cannot be restored to life. Therefore an enlightened government is careful about this, a good military leadership is alert to this. This is the way to secure a nation and keep the armed forces whole.--Sun Tzu, The Art of War