Before:
"I baptize you with water, but one is coming who will baptize with the Holy Spirit and fire" - Luke 3"You shall be baptized with the Holy Spirit" - Acts 1
After:
"As I began to speak, the Holy Spirit fell upon them, just as upon us at the beginning; God gave to them the same gift as to us also after believing in the Lord Jesus Christ" - Acts 11
"For by one Spirit we were all baptized into one body and we were made to drink of one Spirit." - 1 Corinthians 12
Between Acts 1 and Acts 11, we went from 'shall be baptized' to 'were all baptized'. IT happened, the strangest concept in all of Christianity, and probably much of the religious world.
IT - n. - Greek (c) 33 a.d.; the pouring of the Holy Spirit, a portion of the triune God, into the presence and personhood of a believing follower of God.