How does God work miracles in the preaching of the gospel?

Miracles in the context of preaching the gospel serve two primary purposes: to demonstrate God's power and to confirm His message. In Acts 19, we see that special miracles were performed through Paul, showcasing God's authority and ability to save. These miracles acted as signs that accompanied the preaching of the gospel, drawing attention to the message and affirming its truth. Furthermore, the greatest miracle is the transformation of a sinner's heart, regenerated by the Holy Spirit, which speaks to the power of the gospel. When God’s Word is faithfully preached, He accomplishes His purpose through it, validating the truth of the message and bringing about supernatural change in the lives of listeners.