How does the author use imagery in the novel, The Weight of Ink?

The author uses the imagery of light and darkness as religious symbols; faith and the guidance of the Jews is associated with light, whereas hopelessness and lack of trust in God is likened to darkness. The rabbi parallels struggles of faith within the Jewish community to a flickering light. He refers to the spark ignited by Jewish teachings; if extinguished, the souls of his people will be left in darkness without God and the afterlife.