How we cite our quotes: (Part.Chapter.Paragraph)
Quote #1
No one I know has any specific memories. (1.1.6)
This has an upside and a downside, we think. Upside: you wouldn't remember all the stupid stuff and regrets you had in life, like any of your awful haircuts. Downside: you wouldn't remember all the good stuff either. Is it worth it?
Quote #2
I eat the brain, and for about thirty seconds, I have memories. Flashes of parades, perfume, music... life. Then it fades, and I get up [...] feeling a little better. [...] A little less dead. (1.1.21)
R has to live vicariously through other people's memories of life. Because of this, he becomes a little addicted to memories. Maybe zombies don't have to eat brains to stay physically nourished, but they do if they want to be spiritually nourished.
Quote #3
"We have to remember everything. If we don't, by the time we grow up it'll be gone forever." (1.3.46)
Here, Julie doesn't make a distinction between good memories and bad ones. She says it's important to remember everything. But why? Well, in her universe, the alternative is being a zombie who remembers nothing, so we guess we'll grant her point.