"The numbers never stop coming, Mr. Reese."
"When you find that one person who connects you to the world, you become someone different, someone better. When that person is taken from you, what do you become then?"
"I don't have any friends. I don't have any family left either. I went around the world looking for bad guys. But there were plenty of you right here all along."
— John Reese
"Everyone is relevant to someone."
"I know what it's like to lose someone and to feel the need to disappear, but trust me, you don't want to leave people behind."
"Maybe it's up to me to do what the good people can't. Or maybe there are no good people. Maybe there are only good decisions."
"In the end we're all alone, and no one's coming to save you."
— John Reese
"If you really need a mystery, I suggest the human heart."
"Only the paranoid survive."
"I am the evolution of organized crime."
"I looked for a I'm-sorry-I-got-you-shot card, but they were all out."
"One day, I realized all the dumb, selfish things people do... it's not our fault. No one designed us. We're just an accident, Harold. We're just bad code. But the thing you built... It's perfect. Rational. Beautiful. By design."
"Pi, the ratio of the circumference of a circle to its diameter, and this is just the beginning; it keeps on going, forever, without ever repeating. Which means that contained within this string of decimals, is every single other number. Your birthdate, combination to your locker, your social security number, it's all in there, somewhere. And if you convert these decimals into letters, you would have every word that ever existed in every possible combination; the first syllable you spoke as a baby, the name of your latest crush, your entire life story from beginning to end, everything we ever say or do; all of the world's infinite possibilities rest within this one simple circle. Now what you do with that information; what it's good for, well that would be up to you."
—Harold Finch, explaining the value of pi to a math class.
"Your mistakes, like mine, are a part of who you are now. You can't move on from that. Believe me, I've made a sizable number. But...sometimes your mistakes can surprise you. My biggest mistake, for instance, brought me here. At exactly this moment when you might need some help."
—Harold Finch, to a suicidal young man.
"You can't stop what's coming and neither can I, but we have the opportunity to understand things when they finally change. The future is coming. You started it, and I'll finish it."
"We help people out of difficult situations, even situations of their own design."
"If they don't want you to get inside, they ought to build it better."
"There's a time for a scalpel and a time for a hammer. It's hammer time."
"Trust in me. I am always watching."
"We have free will, and with that comes great responsibility. And sometimes great loss."
"I always liked you, Hersh. Even after you killed me."
Root:"How badly did you have to break [The Machine] to make it care about people so much?"
Harold Finch: "I didn't break it, it's what made it work. It was only after I taught The Machine that people mattered that it could begin to be able to help them. I'd like to do the same thing for you, if you'll let me."
"Since we started this, things have changed. We've changed. But the mission, our purpose, has always been constant: to save lives. If that's changed somehow, if we're in a place now where the Machine is asking us to commit murder... that's a place I can't go. I'm afraid this is where I get off."
"The Machine and I couldn't save the world. We had to settle for protecting the seven people who might be able to take it back, so we gave Samaritan a blind spot: seven key servers, that hard-codes it to ignore seven carefully crafted new identities. When the whole world is watched, filed, indexed, numbered, the only way to disappear is to appear, hiding our true identities inside a seemingly ordinary life. You're not a free man anymore, Harold. You're just a number. We have to become these people now, and if we don't, they'll find us, and they'll kill us. I'm sorry, Harold. I know it's not enough. A lot of people are gonna die, people who might've been able to help. Everything is changing. I don't know if it'll get better, but it's going to get worse. But the Machine asked me to tell you something before we part. You once told John the whole point of Pandora's Box is that once you've opened it, you can't close it again. She wanted me to remind you of how this story ends. When everything is over, when the worst has happened, there's still one thing left in Pandora's Box: hope."