Continuing on from the previous thoughts on 2nd Corinthians 3-5:
4. New Covenant ministry should generate boldness. (2 Cor 3:12-18) Moses had to hide what being with God did to him. Not so with us. What happened to Moses was temporary and fading, but what God is doing in us is permanent and increasing. It is so easy to think in terms of this life and fall for the lie of fading glory even today, but what God does in the New Covenant does not fade.
5. We cannot make people see, that is God’s work in Christ. (2 Cor.3:12-18) Israel experienced a hardening and a veil that would keep them from seeing the glory, and it is only by the work of God, through Christ, that it can be taken away. We too minister to people who may still be unable to see the wonder of Christ. We are not to focus on the veil and wrestle with it, but to boldly offer Christ so that the veil might be taken away from their hearts.
6. Transformation comes from beholding the glory of the Lord. (2 Cor 3:12-18) Moses would enter the tent of meeting and encounter the Lord face to face, as a man meets with his friend. Looking at that face changed him, but this would fade. We too are transformed only by gazing on the face of Christ by faith, only now, under the New Covenant, the glory doesn’t fade. Instead, we are transformed from one degree of glory to another. (And one day, when we see him clearly, we will be fully transformed!) It is the object of our gaze that determines who we are. It is true for your listeners, so preach Christ. It is true for you, so gaze on Christ.