The Baptism of the Holy Ghost is the enduement of power from on high upon the clean, sanctified life, and is evidenced by speaking in tongues as the Spirit gives utterance. (Luke 24:49; Acts 1:5-8; 2:1-4)
The baptism of the Holy Ghost is the experience of the Third Person of the Trinity, the Holy Spirit, coming into a person's life to give power for God's service. In order to be filled with the Holy Ghost, a person must first be born again through the experience of salvation. A second step, sanctification, occurs when the saved person goes deeper in consecration and God purges the heart from the inward nature of sin. Then, the heart is ready for the gift of the Holy Spirit.
When one receives the gift of the Holy Ghost, He comes to live in the sanctified heart. When this infilling occurs, it is accompanied by the same sign as the disciples had on the Day of Pentecost—the speaking with "other tongues, as the Spirit gave them utterance" (Acts 2:4). The "other tongues" are a previously unlearned, recognizable language.
Matthew 3:11; Mark 16:17; Luke 24:49; John 7:38-39; Acts 1:5-8; 2:4; 10:45-46; 19:6