John the baptist baptized with water...Jesus Christ baptizes with the Holy Ghost...That was a mystery up until it was revealed to Paul by the Risen Savior...
Rom_16:25 Now to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began,
Eph_3:4 Whereby, when ye read, ye may understand my knowledge in the mystery of Christ)
Eph_3:9 And to make all men see what is the fellowship of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ:
Eph_5:32 This is a great mystery: but I speak concerning Christ and the church.
Col_1:27 To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory:
There were incidents of the Holy Spirit landing on people prior to that but the indwelling of the Spirit wasn't revealed until Paul...
After the Holy Spirit leaves with the church in the Rapture, Jesus takes up where he left off in the Gospels prior to the giving of the Holy Spirit offering the physical Kingdom of Heaven for his original chosen people...
The indwelling of the Holy Spirit was happening while Paul was persecuting the church. The references you gave was Paul explaining the mystery of what already happened and was happening and continues to happen.
I guess I have the same question. How are people saved after the rapture? Please also provide the verses which refer to the departure of the Holy Spirit during the tribulation.