How, in this section, does the author emphasize the implications of finding the Holy Grail?

In this section Sophie, Langdon, and Teabing are struck with the heavy impact of the events unfolding before them. The author takes a break in the action to reveal the inner struggles present in Sophie, Robert, and Teabing while they flee France, and the hunt for them by Fache and his men goes international. Langdon, Sophie and Teabing realize that they must confront the reality of their roles and the danger ahead for them in possessing the keystone. The author offers some foreshadowing that they will, one day, know the location of the Holy Grail and have to decide what to do with their knowledge that will change the course of history.