Answer:
It helps convey the idea that one need not use big words or complicated sentences to express wisdom.
ExpIanation:
According to the passage from "I Know Why the Caged Bird Sings," Maya Angelou makes reference to the wisdom of the short expressions spoken by country people. In that respect, she considers that some people who cannot go to school are smarter than university professors, so their sayings show experience, knowledge and good judgment.