I think this quote relates to the novel because it shows how death and growing up before you die is a central idea in the book. It shows the idea that life is unfair to people, like with all the discrimination, but people can also die and be mature.
don't stand at my grave and weep. i am not there. i do not sleep. i am a thousand winds that blow. i am the diamond glints on snow. i am the sunlight on ripened grain. i am the gentle autumn rain. when you awaken in the morning's hush i am the swift uplifting rush of quiet birds in circled flight. i am the soft stars that shine at night. do not stand at my grave and cry; i am not there. i did not die.