There is a very long discussion between Van Helsing and Seward towards the end of this chapter. What point is Van Helsing attempting to make about Seward?

Seward meets with Van Helsing, who shows him the article about the wounded children and insinuates a connection between Lucy's death and the recent attacks. Seward is skeptical. Van Helsing launches into a long speech about the many unexplained phenomena in the world, urging him to open his mind. Dr. Seward's reopening of his journal, which he though he had finished, parallels the unfinished nature of Lucy's death. What should have been the end, as Van Helsing cryptically says, is only the beginning.