He asked them, “Did you receive the Holy Spirit when you believed?” That is, when you believed in Jesus Christ. They answered, “We have not even heard whether there is a Holy Spirit.” This answer of John’s disciples cannot be understood to mean that they had no notion at all of the existence of the Holy Spirit. First, one must suppose that these disciples were Jews, since there is no evidence that there were then disciples of John among the Gentiles. In that case, although they could not have had a notion of God as triune in Persons, the idea of the Holy Spirit as the Spirit of God could not have been foreign to them. Second, as disciples of John and even as believers, they had to know his prophecy concerning baptism with the Holy Spirit through Christ; Mt 3:11. Finally, they do not say that they do not know whether there is a Holy Spirit. They say, “We have not even heard whether there is a Holy Spirit.” That is, when John’s disciples were brought to faith in Christ, they were catechized only in John’s teaching. They had not been told that believers in Christ receive the Holy Spirit. There had been no mention of the Holy Spirit as the gift of faith in Jesus Christ. Then the apostle revealed to them only the preparatory significance of John’s baptism in relation to Christ. He pointed out that, in order to receive salvation, it was necessary to be baptized with Christ’s baptism. When they heard this, they were baptized in the name of the Lord Jesus. By laying hands on them, Paul brought down upon them the Holy Spirit. This was plainly shown to all when they began to speak in other tongues and to prophesy. In all they were about twelve men.