Such frank speech counteracts the harmful speech found in the book-take as one instance the recurrent slang term "Okie"-and empowers people to take action to face their situations, whether that action be striking for just working conditions or simply moving on in search of safety. The nature of anger is also a central theme in the book.
Following the glad reunion of mother and son in Chapter 8, for instance, Ma Joad asks Tom if his time in prison has made him angry-in her words, "poisoned mad." Tom assures her that it has not, but he does show anger when he thinks about "what they done to our house." Ma urges Tom not to fight "'em" alone.
Actually, the family members are optimistic that the end of their long journey will come after realizing the American dream (Steinbeck 65).
As a result, the desire to have a good life coupled with other motives encourages some family members to fight harder as opposed to those who are unable to see the end result of the journey including Al, Connie, and Noah.
In the Hooverville, for instance, Ma is at first reluctant to share her stew with hungry children who are not her own; in the end, however, she does share it.
The novel's final scene offers the fullest image of "the oversoul," in which Rose of Sharon-who for so long before the delivery of her child was concerned only with her own (legitimate) needs-offers the milk her body made for her own stillborn baby to a man dying of hunger.
Sandry denounces the Saturday night parties as sin.
She does not take part in the dancing, and so can consider herself among the few remaining "true believers." Steinbeck seems to reject a division between flesh and spirit.
Conversely, the Joads display an optimistic mood because as the family expands, the family members get to recognize the need to identify with the group, and thus, they begin to realize the importance of group consciousness.
Hope is also derived from the family’s long and challenging journey, whose experience enlightens some family members such as Ma Joad, Pa Joad, Tom, Jim Casy, John, and Rose of Sharon.