Answer and Explanation:
You forgot to say that this question is about the book "Night".
After finishing the job they were submitted to, Elie and his father are sad, discouraged with anger and without faith in God. The situation they are in is so agonizing, that they for the first time agree that they are suffering and understand each other's difficulties, something that had never happened before.
"Night" was written by Elie Wiesel and tells the sad experience he had with his father when he was imprisoned in the Nazi concentration camps. In this book, Elie portrays violence, forced labor, fear and lack of faith, in addition to reflecting on themes such as abandoning divine beliefs, feeling of disgust and family relationships.