The author allows Sam's character to suffer diverse types of prejudice to convey the main idea of the text.
It is the main subject of the text the idea that builds the entire text.
In "Master Harold" we can see the central idea that racism is promoted without any justifiable reason.
Sam is a black, kind, cultured, and well-educated man who suffers from the most varied types of racism and prejudice, for no reason other than the color of his skin.
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