After a close call with the German soldiers, Peter reads a psalm out loud just in case the soldiers are still eavesdropping. Although he picks a page from the Bible at random, he happens upon a very relevant passage––Psalm 147:4. It describes how God helped the Israelites––that is, the Jews––rebuild after they had been persecuted. It describes God as all-knowing: his understanding is so great that he can number and name the stars. The passage is supposed to offer comfort in times of trouble. Therefore, this choice is particularly comforting for the Jewish refugees in the house, who are about to take a great risk to save their lives.