According to Erickson, the best explanation for the second experience of the Spirit after regeneration in Acts, was due to the fact that they were already regenerate before understanding and receiving the Holy Spirit.
Millard J. Erickson was a theologian and a professor that was born on the 24th day of June, in the year 1932 in the United States of America and he died at the age of 87 years old. According to Millard J. Erickson the disciples were already regenerate before understanding and receiving the Holy Spirit because they have already believed ''the revelation they had received and feared God" that is to say they already regenerate under the new testament system and of course they were not having the holy spirit then.
