“There are little wisps of jelly in a living brain. Deagle knows this well: neurons, transmitting signals - and the soul, so to speak, is somewhere in those flashes. He heard once on a science program that the spindle cell - present in humans, whales, some apes, elephants - may be at the heart of what we call our "selves."What we recognize in the mirror - that thread we follow through time that we call "me"? It's just a diatom, a paramecium, a bit of ganglia that branches and shudders assertively. A brief brain orgasm, like lightning.In short, it's all chemicals. You can regiment it easily enough: fluoxetine, sertraline, paroxetine, escitalopram, citalopram - the brain can be washed clean, and you can reset yourself, Ctrl+Alt+Del. You don't have to be a prisoner of your memories and emotions.”

“How can you come to understand your life when even the beginning is so complicated: a single cell imprinted with the color of your eyes and the shape of your face the pattern on your palm and the moods that will shadow you through your life. How can you be alive when every choice you make breaks the world into a thousand filaments each careless step branching into long tributaries of alternate lives shuddering outward and outward like sheet lightning.”

“There is a stage you reach, Deagle thinks, a time somewhere in early middle age, when your past ceases to be about yourself. Your connection to your former life is like a dream or delirium, and that person who you once were is merely a fond acquaintance, or a beloved character from a storybook. This is how memory becomes nostalgia. They are two very different things - the same way that a person is different from a photograph of a person.”

“The true terror Jonah thought the true mystery of life was not that we are all going to die but that we were all born that we were all once little babies like this unknowing and slowly reeling in the world gathering it loop by loop like a ball of string. The true terror was that we once didn't exist and then through no fault of our own we had to.”

“What if she never knows the end of the story? She shudders, and her mind continues to lurch forward into the future, that simple expectation of time passing - another moment, and another moment. It seems impossible that it will abruptly cease. It seems impossible that you will never know what happens next, that the thread you've been following your whole life will just... cut off, like a book with the last pages torn out. That doesn't seem fair, she thinks.”

“I guess," says Deagle, finally, "I'll just have a pack of Marlboro Lights. That's what I used to smoke when I was human.”

“There are so many people we could become, and we leave such a trail of bodies through our teens and twenties that it's hard to tell which one is us. How many versions do we abandon over the years?”