"Scientifically, I know beginnings don’t exist. The world is made of energy, which is neither created nor destroyed. Everything she is was here before me. Everything she was will remain. Her existence touches both my past and my future at one point—infinity. Lifelines aren’t lines at all. They’re more like circles. It’s safe to start anywhere and the story will curve its way back to the starting point. Eventually. In other words, it doesn’t matter where I begin. It doesn’t change the end."