“Then Simon himself believed also: and when he was baptized, he continued with Philip, and wondered, beholding the miracles and signs which were done.”
King James Version (KJV)
8:13 And Simon believed - That is, was convinced of the truth.
Ac 8:13 Then Simon himself believed also. There has been much needless discussion whether Simon was sincere. It would never have been doubted had we not been told that later he fell into sin. It is best to take the Scripture in its manifest sense. He became a believer like the rest. He was baptized like the rest; then, like many others, at a later period, under temptation, he fell into sin. It is impossible to believe that a man of his power and influence in Samaria would have yielded outwardly to the gospel and shown the deference he manifested to Philip unless he was at the time sincere. But he was of the class described by the Savior when the seed of the sower fell among among thorns (Mt 13:22 Mr 4:18,19).