Yukio Mishima, Spring Snow (春の雪 Haru no Yuki)
The lovers chose these verses from their cultural history to express their feelings. Mishima chose this device to express how, in cultural history, compatible energies emerge and find their way to connect.
This is a law of physics we call magnetism. It applies through all creation. It applies to us and to our work. Gustav Jung called it Syncronicity which James Redfield used in the Celestine Prophecy. Another word is Syncopation. Jung, like many shamen explains that it is responsible for sensory Deja Vu, "when two timelines converge".
The beautiful book is not specifically about this, or, perhaps it is.