A theme could be "life or death" because throughout the novel because for an example Montags wife attempts suicide until montag finds her and calls for emergency help and saves her life, and while they were trying to help her its unclear if she was going to live or die, so while all this is happening monag starts to womder what life really is.
<span>He is trying to say that there is something to be feared from people who keep silent despite bad circumstances because it shows that they are plotting something. There is nothing to be feared from a fool who exposes their thoughts and emotions.</span>