When they heard this...

 

John the Baptist was sent by God to prepare the way for Him. Isaiah prophesied of John:

"The voice of him that crieth in the wilderness, Prepare ye the way of the LORD, make straight in the desert a highway for our God." - Isaiah 40:3 KJV

"In those days came John the Baptist, preaching in the wilderness of Judaea, And saying, Repent ye: for the kingdom of heaven is at hand. For this is he that was spoken of by the prophet Esaias, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight." - Matthew 3:1-3 KJV

John the Baptist’s baptism was the baptism of repentance. John the Baptist did not baptize in the name of Jesus.

In the book of Acts, which describes the beginning of the church with the outpouring of the Holy Ghost on the day of Pentecost and the spread of the gospel, Apostle Paul came upon some disciples of John the Baptist.

These men had not heard that the Holy Ghost was being poured out. They had been baptized by John the Baptist’s baptism of repentance. They had not been baptized in the name of Jesus.

"And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples, he said unto them, Have ye received the Holy Ghost since ye believed?

“And they said unto him, We have not so much as heard whether there be any Holy Ghost.

“And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.

“Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.

“When they heard this, they were baptized in the name of the Lord Jesus.

“And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied." - Acts 19:1-6 KJV

If you haven’t been baptized in the name of Jesus, be re-baptized, like they were in the Bible!