In chapter 9, Mr. Henry Gatz experienced great pride. Nick narrates:
After changing my clothes I went back next door and found Mr. Gatz walking up and down excitedly in the hall. His pride in his son and in his son's possessions was continually increasing and now he had something to show me.
Mr. Gatz' pride was growing with his increasing knowledge of the material wealth his son had. Having come from the Midwest, Mr. Gatz must have believed that his son worked extremely hard to get these material items. Of course the item he refers to that he wanted to show Nick was Jay's old schedule and list of resolves. The traits Jay practiced as a kid model a hard-working moral citizen's fortitude.
Another legitimate feeling of Mr. Gatz was anxiety. Of course, experiencing the death of a child would cause anyone anxiety, but as people failed to show for the funeral, I think it left him wondering why.