12 But when they believed Philip as he preached the things concerning the kingdom of God and the name of Jesus Christ, both men and women were baptized. 13 Then Simon himself also believed; and when he was baptized he continued with Philip, and was amazed, seeing the miracles and signs which were done. (Acts 8:12–13, NKJV)
Was Simon really saved? If not, neither were the Samaritans we read about in this passage. He heard the same preaching they heard. He believed the same word about the kingdom of God and the name of Jesus Christ they believed. Were they saved when they believed and were baptized? According to Mark 16:16, yes, for there Jesus said, “He who believes and is baptized will be saved; but he who does not believe will be condemned.” The Samaritans were saved when they believed and were baptized, and so was Simon. Any attempt to cast doubt upon the credibility of Simon’s conversion throws the same shadow of doubt upon all the Samaritans. There is great assurance and abiding joy that when sinners hear the word of Christ, believe it and are baptized, they are saved (Acts 8:5-8). Take heed to the plan of salvation Jesus preached in Mark 16:16, and that saved the Samaritans and Simon in Acts 8:12-13. Otherwise, you will find yourself fighting against God.