The three things that Atticus can do according to Miss Maudie are:
1) Atticus is an expert shot. He was known as the "one-eyed shot"
2) Atticus is a man of integrity. How he behaves in private is the same way he behaves in public.
3) Atticus is civilized in his heart. Thus, he gave up hunting and shooting despite his proficiency and marksmanship.
