The Question and Answer section for Night is a great resource to ask questions, find answers, and discuss the novel.
The violin is Julek's gift to the world. It is an expression of his gentle soul that can transcend the brutality that even the Nazis can inflict.
Eliezer discovers that he is lying on top of Juliek, the violin musician who had befriended in Buna.
Zelman was always praying and meditating on the Talmud to distract him from his reality.