“You cannot be betrayed by your enemies, only your friends.”
“There's ways you can trust an enemy you can't always trust a friend. An enemy's never going to betray your trust.”
“Your enemies can kill you, but only your friends can hurt you.”
“Do not fear your enemies. The worst they can do is kill you. Do not fear friends. At worst, they may betray you. Fear those who do not care; they neither kill nor betray, but betrayal and murder exist because of their silent consent.”
“It’s the enemy of your enemy who is your friend Sophie, not the friend of your friend.”
“Only a true best friend can protect you from your immortal enemies.”