What does the Bible say about Elijah's role in restoration?

Elijah's role in restoration is central to several biblical prophecies, particularly in the context of preparing the nation of Israel for the coming of Christ. In Mark 9:12, Jesus states that 'Elias...verily come at first, and restoreth all things.' This underscores the importance of Elijah as a forerunner, not only in a literal sense but spiritually, as he represents the call to true worship and repentance from idolatry, which had permeated Israel due to the disobedience of its kings, particularly Solomon and Ahab. Elijah was sent by God to confront the unfaithfulness of Israel and restored the knowledge and worship of the one true God, showcasing God's persistent pursuit of His people for their true worship.