Why is "Jean Louise, stand up. Your father's passin'." relevant with repsect to the theme or symbolism in this book?

Despite the unfavorable verdict, the black community pays tribute to Atticus for the respect he has shown their community and the human race. Atticus dedicated himself to the trial, which everyone knew was a lost cause. He tried as best he could to allow Tom to go free, and worked to teach the townspeople a lesson by exposing the unfairness of their collective opinions. Just as he fathers Jem and Scout in good moral virtues, he tries to teach the town a lesson and infuse them with more virtuous ideas.