How does the character of Boo Radley in To Kill a Mockingbird show courage by saving Jem and Scout and by leaving his house?relate your answer...

Boo Radley suffers from a form of social anxiety which
makes it almost impossible for him to leave his home, and interact with
others. 

You provided a quote, “Courage is resistance to
fear, mastery of fear – not absence of fear”.  This quote is certainly relevant to Boo
Radley’s character. 

Saving Jem and Scout from the vicious
attach of Bob Ewell would have required Boo to leave his home.  Can you imagine how
difficult this would be for someone who suffers from such a severe form of social
anxiety?  He must have known that by saving “his” children, that he would have received
unwanted attention.  Yet, despite this extreme fear, he did not let this stop him from
saving the children. 

Therefore, bravery is not the
absence of fear, but the actions that occur
despite our greatest fears.