As pertaining to reality:
"But, don't let appearances fool you. There's always only one reality." (p. 16 in my nook)
As to writing in connection with existence:
Tengo said, "When I'm writing a story, I use words to transform the surrounding scene into something more natural for me. In other words, I reconstruct it. That way, I can confirm without a doubt that this person known as 'me' exists in the world. This is a totally different process from steeping myself in the world of math."
"You confirm that you exist," Fuka-Eri said.
"I can't say I've been one hundred percent successful at it," Tengo said. (p. 61)
As to the majority in society:
"Finally," his girlfriend said, "everybody feels safe belonging not to the excluded minority but to the excluding majority. You think, Oh, I'm glad that's not me. It's basically the same in all periods in all societies. If you belong to the majority, you can avoid thinking about lots of troubling things." (p. 91)
As to our ever changing world:
Maybe I can look at it this way--the problem is not with me but with the world around me. It's not that my consciousness or mind has given rise to some abnormality, but rather that some kind of incomprehensible power has caused the world around me to change. (p. 128)
As to the title and its meaning:
1Q84--that's what I'll call this new world, Aoname decided.
Q is for "question mark." A world that bears a question.
Aomame nodded to herself as she walked along.
Like it or not, I'm here now, in the year 1Q84. The 1984 that I knew no longer exists. It's 1Q84 now. The air has changed, the scene has changed. I have to adapt to this world-with-a-question-mark as soon as I can. Like an animal released into a new forest. In order to protect myself and survive, I have to learn the rules of this place and adapt myself to them. (p. 133)
As to how we fit in the world. Or, don't:
Either I'm funny or the word's funny, I don't know which. The bottle and the lid don't fit. It could be the bottle's fault or the lid's fault. In either case, there's no denying that the fit is bad. (Aomame p. 134)
As to belonging:
As to the role of story:
No matter how clear the relationships of things might become in the forest of story, there was never a clear-cut solution. That was how it differed from math. The role of a story was, in the broadest terms, to transpose a single problem into another form. Depending on the nature and direction of the problem, a solution could be suggested in the narrative. Tengo would return to the real world with that suggestion in hand. It was like a piece of paper bearing the indecipherable text of a magic spell. At times it lacked coherence and served no immediate practical purpose. But it would contain a possibility. Someday he might be able to decipher the spell. That possibility would gently warm his heart from within. (p. 207-208)