How did Hiram and his father’s relationship change throughout the novel

Harlan is the father of Hiram and is Grampa's only son. At the beginning of the novel, Harlan is living in Oxford with Hiram's mother as he finishes school to become a teacher. His main desire is to leave the South and to get away from the prejudiced notions contained in it. His way of thinking is opposite what many in the Greenwood community accept as normal and is the cause for Grampa's embarrassment and past social status.

Harlan's views came about in his youth but expanded over time, especially after he served in World War II. Upon coming back to Mississippi, he finds that he can no longer be a part of such a prejudiced society and is very vocal about this. The relationship between Harlan and Grampa is very strained because of this and is further complicated when Harlan decides to move to Arizona, taking Hiram with him. Harlan does not want Hiram returning to Greenwood although Grampa invites Hiram to be there every year. This is the cause of many years of arguing between Hiram and Harlan.

It is only in 1955 when Grampa has a stroke that Harlan relents and sends Hiram to Greenwood. Before Hiram leaves, Harlan warns Hiram that what Hiram sees he may not like. Hiram finds that this is true as the summer wears on and ends up missing his father more than ever. Once Hiram acknowledges that Harlan was right Hiram is able to begin reconstructing his relationship with his father.

What did Hiram's dad warn him about