“What haunted people even, perhaps especially, on their deathbed? What chased them, tortured them and brought some of them to their knees? And [he] thought he had the answer. Regret. Regret for things said, things done, and things not done. Regret for the people they might have been. And failed to be. ”

“When Olivier had been taken away Gamache had sat back down and stared at the sack. what could be worse than Chaos, Despair, War?What would even the Mountain flee from? Gamache had given it a lot of thought.What haunted people even, perhaps especially, on their deathbed? What chased them, tortured them and brought some of them to their knees? And Gamache thought he had the answer.Regret. Regret for things said, for things done, and not done. Regret for the people they might have been. And failed to be.Finally, when he was alone, the Chief Inspector had opened the sack and looking inside had realize he'd been wrong. The worst thing of all wasn't regret.”

“Regret for things we have done can be tempered by time, it is regret for things we have not done that is inconsolable.”

“I'd rather regret the things I've done than regret the things I haven't done.”

“Regrets are the last words you speak to your loved ones when you die and the one thing we all fear when we live. I'd rather regret the things I've done and said than regret the things I haven't done or said. It is all the experiences and people you missed out on in life that you will feel the most regretful for in the end. God will forgive you of your mistakes, but there is nothing to forgive if you have never even tried, done or said anything that made a difference in your life or others.”

“I'm done with those; regrets are an excuse for people who have failed.”