In 2 Corinthians 11, the apostle Paul defends his ministry and responds to those who undermine his authority. He lists his qualifications, including his sufferings and endurance, and contrasts himself to false apostles who try to deceive the Corinthians. He also warns the Corinthians about false teachings and encourages them to remain steadfast in their faith. The chapter highlights the challenges of leadership and the importance of staying true to one's convictions.