The Bible teaches that Christians everywhere should be filled with the Holy Spirit once they are Born Again. The infilling of the Holy Spirit class is designed to help Christians receive what God has planned for his people.
“And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting. And there appeared unto them cloven tongues like as of fire, and it sat upon each of them. And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them the ability.” Acts 2:24
"And you shall receive power when the Holy Spirit has come upon you.” Acts 1:8a