If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle.
My Administration will not authorize the indefinite military detention without trial of American citizens. Indeed, I believe that doing so would break with our most important traditions and values as a Nation.
I think the key anecdote in the book is when Colin [Powell] and I were discussing Iraq. Colin was upstairs in the Treaty Room, in the residence. And he talks about his concerns about the use of military in Iraq. And I said I felt the same concerns, but it might be that we have to use it. In which case, he said, "I support you."
Mankind are in the end always governed by superiority of intellectual faculties, and none are more sensible of this than the military profession. When, on my return from Italy, I assumed the dress of the Institute, and associated with men of science, I knew what I was doing: I was sure of not being misunderstood by the lowest drummer boy in the army.
Military necessity does not admit of cruelty - that is, the infliction of suffering for the sake of suffering or for revenge, . . . nor of torture to extort confessions.