“For this cause also thank we God without ceasing, because, when ye received the word of God which ye heard of us, ye received it not as the word of men, but as it is in truth, the word of God, which effectually worketh also in you that believe.” 1 Thessalonians 2:13 (KJB).
Paul was a thankful man. It gave his heart joy to see people come to saving faith in Jesus Christ through the preaching, and teaching of the word of God. Remember what he preached was from the Old Testament. That was what they had. Some of the New was out there, but not readily available.
These people had been people bound in darkness. The Apostle had come to them with the good news of the gospel – the death, burial, and resurrection of Jesus Christ – and they had heard, and believed. Lives had been changed. There was true repentance; a complete turn around, a change in their lives.
All the talking and powers of persuasion are not always effective at changing someone’s mind or heart. With the gospel it is only the power of the Holy Spirit who can reveal the truth of the gospel, the power of the gospel, and the light of the glory of Jesus Christ; that He is the Son of God, God the Son.
Will you be the joy of someone’s heart today? Has the Spirit of God revealed to you the truth of who Jesus is? Turn to Him, away from sin, believe Him, and be saved.