How does Elizabeth assert her royal authority in this speech?

In her speech, Elizabeth asserts her royal authority by confidently declaring her commitment to her role as monarch and emphasizing her divine right to rule. She reinforces her strength and determination, portraying herself as a capable leader who prioritizes her people's welfare. By addressing her subjects directly and articulating her vision for the nation, she establishes a connection that underscores her legitimacy and responsibility as queen. This combination of personal conviction and public duty reinforces her sovereignty and command over her realm.