2 Corinthians 3 mainly addresses the issue of the superiority of the new covenant over the old covenant. The chapter discusses how the new covenant, which is based on the Spirit, is more glorious than the old covenant which was based on the law. The chapter also highlights the importance of the Holy Spirit in life and how it transforms believers into the image of Christ. It emphasizes that Christians are not bound by external laws, but their obedience comes from their hearts that are led by the Holy Spirit. Additionally, it talks about the veil that separates individuals from seeing the glory of the Lord, which can disappear by turning to the Lord and receiving the Holy Spirit