How does preaching reveal God's mercy?

The proclamation of the Gospel, centered on the sacrifice of Christ, is the primary way God's mercy is revealed to humanity. In 2 Corinthians 5:18-19, we see that God was in Christ, reconciling the world to Himself by not accounting their sins against them. This divine act of mercy shows that despite our rebellion and sinfulness, God freely offers forgiveness through the atonement of Jesus. When preachers convey the message of reconciliation and grace found in Christ, they are displaying the depth of God's mercy and inviting sinners to rest in His sufficiency for salvation.