The line in High Fidelity (the book) goes like this: "I've been letting the weather and my stomach muscles and a great chord change in a Pretenders single make up my mind for me, and I want do it for myself." It comes near the end of the book. For those with only knowledge of the movie, it would be in the bar scene, where Rob asks Laura to marry him.
For those of us who love music - for those of us who love any kind of art form purely and with great fervor - we understand what Rob is talking about in that passage. It's a bit inexplicable how a moment of music, or a scene in a movie, a brush stroke in a painting can change your mind, but it can.
