“NSA is a very conservative culture legally. Our lawyers at NSA were notorious for their conservatism up through the morning of September 11th, 2001. The single most consistent criticism of the NSA legal office by our congressional oversight committee was that our legal office was too conservative.”

“Anger can be a useful emotion; it's built into our genetic code to help with self preservation. But it can also be destructive, even when it is justified.”

“Global security can be formed or threatened by heads of state whose wisdom, folly and obsessions shape global events. But often it is the security practitioners, those rarely in the headlines but whose craft and energy quietly break new ground, who keep us safe or put us in peril.”

“The arc of technology is in the direction of unbreakable encryption, and no laws are going to get in the way of that reality.”

“A writer of fiction lives in fear. Each new day demands new ideas, and he can never be sure whether he is going to come up with them or not.”

“It's good to remind intelligence producers and consumers alike about the need to 'warn of emerging conditions, trends, threats and opportunities' and the potential for discontinuities.”

“When the intelligence is making a policymaker too happy, he ought to challenge it, and even if he doesn't, the intelligence briefer needs to launch a red team against his own conclusions to see if he can hold his ground.”

“Presidents get to decide how their intelligence is served up to them, and it's the job of intelligence to adjust.”

“The 2007 National Intelligence Estimate that said Iran had paused its nuclear weaponization work also reported with high confidence that such work had been going on through 2003. How far did they get? That's an important question, but I fear that the Iranians will never answer it, and we will not insist that they do.”

“President Obama and his successors are dependent on the 100,000-plus people inside the American intelligence community - the people Edward Snowden betrayed.”

“American political elites feel very empowered to criticize the American intelligence community for not doing enough when they feel in danger, and as soon as we've made them feel safe again, they feel equally empowered to complain that we're doing too much.”