Final answer:
Atticus tells Scout and Jem to heed Aunt Alexandra's advice on etiquette and behavior, yet also stresses the importance of maintaining their own moral principles and self-respect above societal expectations.
Step-by-step explanation:
Responding to Aunt Alexandra's advice, Atticus tells Scout and Jem to be more cultured and well-behaved, but then he contradicts this by emphasizing the importance of individuality and moral integrity. He wants his children to grow up with a strong sense of self-respect and an understanding of what is just and right, even if that means going against the societal norms of their community. Through his advice, Atticus imparts the lesson that one should hold to personal convictions and that these inner principles are more important than merely fitting in or behaving as others expect.