Why does the Qur'an sometimes refer to itself in the third person and other times in the first person?

While reading the Qur’an, I noticed that it refers to itself in different ways—sometimes saying **“We revealed the Qur'an”** (e.g., *Innā naḥnu nazzalnā al-dhikr*), and in other places referring to it in the third person, like **“This is the Book”** (*Dhālika al-kitāb*). *My Question* *How have classical scholars and modern commentators interpreted these shifts? And does this variation carry implications for understanding divine speech and authorship in Islam?* I’m especially interested in how scholars of *tafsīr* and Arabic rhetoric have explained this pattern.