People can overcome barriers by talking to people and talking about what is causing them to stop.
Scout and Jem respect their dad but they call him Atticus. This is because Atticus treats the kids as equals and has adult conversations. They also think Atticus is brave and courageous for defending Tom Robinson because all the other people thought he was guilty.
The whole poem is basically a metaphor describing hope. If this is not the answer you are looking for I would say
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The third amendment of the constitution was particulary one of the out founders of their time.
