How do we know the preaching of the gospel is a miracle?

Gospel preaching is referred to as a miracle for several reasons. First, it originates from God, reflecting His sovereign initiative in revealing Himself through human messengers who are themselves sinners. The preacher, despite their own flaws, declares the message of Christ, which can only be accomplished by divine power. Moreover, the very act of belief—where a sinner recognizes their need for a Savior and responds in faith—is miraculous, as it requires the Holy Spirit to awaken and convict the heart. Preaching Christ, therefore, is an extraordinary conveyance of grace, manifesting God's work in the hearts of those hearing it. It transcends mere human effort, demonstrating God's faithfulness to redeem His elect through the folly of preaching.