What is one theme in flannery o'connor's everything that rises must converge

A theme in this story is about the relationship between the mother and the grown son, Julian and there is obvious tension between them and it appears mostly to be over the yearning of the mother for the days when her family were large landowners with slaves and how the son feels guilty about this attitude of his mother regarding slavery and tries to atone for it by sitting beside African Americans on the bus.

He could achieve one important goal and then stop for the day

Yes no matter what a bible says because church and state are separate