Who Was Ezra? Priest and Scribe in Ezra 7
Ezra arrives in the text as a priest with a long pedigree and a scribe with real competence in the law of Moses. But his authority rests on something prior: he had set his heart to seek Yahweh's law, to do it, and then to teach it.
Ezra 7:10: Seek, Do, Then Teach the Law
Ezra 7:10 gives the reason the journey went as it did: Ezra had settled in his heart to seek God's law, to obey it, and only then to teach it. The order is the point.
Who Was Cyrus the Great in Isaiah 45?
Cyrus the Great was a real Persian king whom God called by name, gave a title, and enlisted as his shepherd for Israel's sake. The passage aims past Cyrus to the knowledge of God from east to west.