2 Corinthians 10 is primarily concerned with Paul defending his ministry and authority against various critics who have questioned his legitimacy as an apostle. Paul addresses these concerns by emphasizing that his authority actually comes from God, and not from any human source. He also warns his readers against judging by outward appearances, and argues that his strength lies not in worldly power or influence, but in the power of God. Throughout the chapter, Paul acknowledges the challenges he faces as an apostle, but he ultimately remains steadfast in his faith and commitment to spreading the gospel.