Foundations and Reflections Sura Yasīn Part 5: Education and Sophistication

Sura Yasīn flips the scrip; it moves from addressing the Prophet and his community, to a story about a city similar to his; and now, suddenly it returns to teaching his community. Why? What does that tell us about the sophistication of the Qur'anic message and the deliberate excellence we need if we want to stand in the office of Prophethood?