What was Ezra's main objective upon returning to Jerusalem?

Ezra's primary objective upon returning to Jerusalem was to teach the Law of the Lord. He played a significant role in the spiritual and religious restoration of the Jewish people after their return from Babylonian exile. Ezra was not only a scribe but also a leader who sought to reinstate proper worship and adherence to the Law given to the Israelites. His efforts focused on instructing the people in the statutes and ordinances of the Torah, emphasizing the importance of living according to God's commandments. This goal was essential for re-establishing Jewish identity and community life in Jerusalem after years of exile and cultural dilution.

In the context of the other options, while building a wall can be tied to Nehemiah's mission to restore the city's physical defenses, and reestablishing the Temple was indeed crucial, these tasks were secondary to Ezra's emphasis on the teaching and implementation of the Law. The option regarding finding the lost tribe of Israel diverges from Ezra's goals, as the focus was more on re-establishing the existing community in Jerusalem rather than seeking out other tribes. Thus, Ezra's commitment was primarily centered on spiritual revival through the teaching of the Law, which shaped his mission and contributions to the community.