Pentecostal Christians take their name from Acts 2 and its description of the baptism of the Holy Spirit, which occurred among Jesus’ disciples at Pentecost.
For Pentecostals, this baptism of the Spirit is essential in the life of each Christian, more important than the symbolic baptism in water. The book of Acts reports that baptism in the Spirit was a key feature of the early Christian’s experience.
In 1 Corinthians 12, Paul describes the various “spiritual gifts” Christians have, including speaking in tongues. These gifts are important to Pentecostals and are evidence of having been baptized by the Spirit.
Many denominations consider themselves Pentecostals, including the fast-growing Assemblies of God. Pentecostals are similar in many ways to charismatics (see 328).