. Okonkwo's fear was greater than these. It was not external but lay deep within himself. It was the fear of himself, lest he should be found to resemble his father. Even as a little boy he had resented his father's failure and weakness, and even now he still remembered how he had suffered when a playmate had told him that his father was agbala. That was how Okonkwo first came to know that agbala was not only another name for a woman, it could also mean a man who had taken no title. And so Okonkwo was ruled by one passion - to hate everything that his father Unoka had loved. One of those things was gentleness and another was idleness.
This quote is a very straight forward example of how Okonkwo's father affected him.Because Unoka was gentle and unaccomplished he was jokingly called a woman. This led Okonkwo to have strict ideas on what a man can or can't be. In Okonkwo's mind if he isn't tough, aggressive, and titled he's not really a man. This fear that Okonkwo holds is his hamartia. It's what will lead to his downfall. As the novel progresses we see areas where his obsessive need to be 'masculine' causes issues. Such as when he attacks his wife during the holiday of peace. Okonkwo is so scared that his wife will change her views of him that he attacks her. This harsh view of masculinity doesn't correlate to that of the rest of his clansman. When he meets with them to discuss what will happen with Ikemefuna he goes against their suggestions. All the men suggest that if Ikemefuna is to die Okonkwo shouldn't be the one to kill him let alone go with them. Okonkwo doesn't want to look weak so he goes with and is the one who ends up killing Ikemefuna despite his emotions towards the matter. The following article discusses how your childhood can directly affect your emotional state as an adult. http://www.npr.org/sections/health-shots/2014/12/19/371679655/some-early-childhood-experiences-shape-adult-life-but-which