Acts 8:13

13 And Simon also himself believed: and being baptized, he continued with Philip; and beholding signs and great miracles wrought, he was amazed.

Acts 8:13 Meaning and Commentary

Acts 8:13

Then Simon himself believed also
With an historical and temporary faith, as that Jesus was the Messiah or at least he pretended, to believe this, and professed that he did believe, what others did, and Philip preached:

and when he was baptized;
upon profession of his faith, which he so artfully made, that Philip could not discover his hypocrisy: but taking him to be a sincere believer, admitted him to baptism: after which,

he continued with Philip;
kept close to him, and got into a familiar acquaintance with him; and constantly attended on his ministry, as if he had been a sincere disciple and follower of Christ:

and wondered, beholding the miracles and signs which were done;
he was as much amazed at the miraculous performances of Philip, as the inhabitants of Samaria had been at his, which he could observe were real things; and this increased his wonder, and threw him into an ecstasy, that he was scarce himself: whereas he knew that what he did were only sham performances, and legerdemain tricks.

Acts 8:13 In-Context

11 And they gave heed to him, because that of long time he had amazed them with his sorceries.
12 But when they believed Philip preaching good tidings concerning the kingdom of God and the name of Jesus Christ, they were baptized, both men and women.
13 And Simon also himself believed: and being baptized, he continued with Philip; and beholding signs and great miracles wrought, he was amazed.
14 Now when the apostles that were at Jerusalem heard that Samaria had received the word of God, they sent unto them Peter and John:
15 who, when they were come down, prayed for them, that they might receive the Holy Spirit:
The American Standard Version is in the public domain.