What does the Bible say about leadership in the church?

In 3 John, we see a vivid contrast between leadership styles as exemplified by Diotrephes, who seeks preeminence and rejects apostolic authority, and leaders like Gaius and Demetrius, who are commended for their faithfulness and service. Biblical leadership is characterized by humility and service, as shown by Jesus in Matthew 20:25-28, where He instructs that greatness in His kingdom is achieved through serving others. This demonstrates that a true leader in the church reflects Christ's character, prioritizing the well-being of others over personal glory.