This book began the way most honest things do — without a plan.
I was thinking about a train journey, and about the kind of conversation that is only possible when two strangers find themselves suspended between destinations. There is something about movement, about the particular loneliness of transit, that loosens the mind. You are neither where you were nor where you are going. You have no role to perform. And so, sometimes, you think.
Dr. Harrison Kent is a theoretical physicist. Isabella Amore is an artist. They do not belong to the same world — or so they each believe. What unfolds between them, over the course of a single train journey from somewhere to Los Angeles, is not a love story in the conventional sense. It is something I find more interesting: two intelligent people genuinely trying to understand each other, and in doing so, catching unexpected glimpses of themselves.
The questions they ask are not new. What is consciousness? What is love — and is it chemistry, philosophy, or something that escapes both? Does God exist, or was God invented? When a spacecraft lands on the moon, is it triumph or distraction? These are old questions. I am not under the illusion that this book answers any of them. But I have always believed that the quality of a question matters more than the availability of its answer. The examined life is not the one that arrives at conclusions — it is the one that keeps asking.
Harrison brings the precision of science: measurement, evidence, the beautiful discipline of not believing something simply because it would be comforting to do so. Isabella brings what science, at its coldest, sometimes forgets — that the human experience of being alive is not a variable to be controlled. She feels the weight of the world in ways that do not fit into equations, and she does not apologize for it.
Neither of them is entirely right. Neither is entirely wrong. That tension is the book.
The title carries two meanings deliberately. A train of thoughts: the associative, wandering, interrupting, looping process by which the mind actually moves — nothing like the linear arguments of textbooks. And a train of thoughts: this specific train, these specific hours, these two people thinking out loud at each other. I chose the double meaning because I believe they are the same thing. The best conversations are journeys. You do not know where they will take you when you board.
I have tried to write in good faith — to give Harrison's skepticism its full intelligence, and Isabella's feeling its full dignity. I am not interested in strawmen. I am interested in what happens when two genuinely held worldviews collide without either side running away.
If you are reading this looking for answers, I hope you are gently disappointed. If you are reading this looking for better questions, I hope I have not let you down.
The train is leaving. Take a seat.