Like much in Wiesel's work, there is nothing simple and direct. Everything converges within one another and diverges from it. This brings to light that your search for "six themes" might have to be seen in different lights. One profound theme present is the astonishing level of cruelty that human beings can display to one another. Eliezer's entrance into Auschwitz is something that can testify to this. The unbelievable sights of children and bodies being burned is something that represents how horror can be accepted and sanctioned by a governing institution. Along these lines, I think that Wiesel does a wonderful job of being able to show that the real terror involves the dehumanizing effects that hatred has on all individuals. The opening scenes of rejecting Moshe the Beadle's warnings and the silencing of Madame Schachter in the most cruel of ways represents Wiesel's belief that hatred's worst impact is how its victims regard one another. In this light, there is not an emphasis on solidarity, but rather how human beings, tired of being the victims of hatred, seek to do to the same to one another, continuing a cycle of disdain for human beings. Another element of hatred that is present is how the true horror of the Holocaust was the denial of hope. When the little boy is hung and "God is there- in the gallows," it is a moment when the reader fully grasps the impact of the Holocaust in the hatred of the divine for compelling individuals to endure such a predicament. In the end, these explorations of "hatred" occupies central importance in Wiesel's work.