Baptism of the Holy Spirit is essential for salvation

The first baptism is being baptized by full immersion in water, this is a symbolic baptism unto repentance, symbolic of being born again but it doesn't mean you are actually born again. Anyone can be baptized whether or not they will actually truly repent, receive the Godly sorrow into their hearts and allow Christ to transform them is another story completely. The second baptism is being baptized by the Holy Ghost and by fire, as stated by John the Baptist, not my words. It is at the time of second baptism by the Holy Ghost that you are actually born again.