What part of this excert is to kill a mocking bird a metaphor

One metaphor in To Kill a Mockingbird is Atticus's advice for Scout to " . . . climb into [someone's] skin and walk around in it" (ch. 3). By this, he means that in order to understand someone, you should try to see things from their perspective.

the reason some people sacrifice their own life for another person's life could be that they are in love with them and would do anything to keep them safe a protected even if that means risking their life in the process

i think the anti-race spokesman is working to achieve equality between whites and blacks and to encourage blacks to shakespeare's theory