jorgen- yes i do believe you need the Holy Spirit to enter into heaven. the bible lays out the plan of salvation as this: to believe on Jesus and accept Him into your life as Lord and see your need for Him as a savior. which will then lead you to repentance of your sins and baptism in Jesus name ( for there is none other name given to man by which we must be saved ) and then God promises to fill you with the Holy Spirit as a comforter, regenerator, and power and authority.