The "trap of deification" as referred to in line 85 is the limitations imposed by a belief in one's own superiority.
Explanation:
A deity in this context refers to divine status, quality or nature.
Therefore, the trap of deification as shown in line 85 is simply the limitations that is brought about by a belief in one's own superiority over others.
To think of oneself above others and to subjugate others to the role of "lesser humans" is an act of limiting one's self and falling in the danger of "trap of deification"
Answer: the message is to have courage and Atticus demonstrates his courage by shooting and killing the rabid dog in one shot while the rest of the community takes cover. Jem and Scout are astonished at their father's marksmanship abilities and were completely unaware that Atticus was the most deadly shot in Maycomb.