A precedent is in this novel, Janie in the long run comes to relate Tea Cake with the sun. He satisfies her. He gives her life—or, in any event, he improves her life way. Furthermore, even after he kicks the bucket, Janie keeps on considering Tea Cake as far as the sun: in spite of the fact that he's perished, he keeps on enhancing Janie's life.
The sun illustrates, just by rising for a long time, that life goes on, regardless of how shocking yesterday was. For Janie, Tea Cake's memory will be as suffering as the sun.
Some sources will state historic events, however if they were written a long time AFTER the events happen it is not credible because the person who wrote the source was not present at the time of the event.