‘He realised that God gave him an unfair advantage over most living things.’ (Miss Maudie)

Atticus realised, many years ago, that he has a special ability to shoot with great accuracy. As a man of God he believe that The Lord gave him his skill. ‘ I guess he decided he wouldn’t shoot till he had to, and he had to today.’ He feels that he can’t take advantage of the abilities  that was given, therefore he doesn’t touch a gun until he has to.