Just the way the Bible says:
1 John 5:1 Whosoever believeth that Jesus is the Christ is born of God...The verb tense is very specific. Whoever believes [present tense] has been [past tense] born of God.
John 3:3 Jesus answered and said unto him, "Verily, verily I say unto thee, unless a man be born again, he cannot see the Kingdom of God."Unless a man is born of God, he cannot see the Kingdom of God. It is plainly written right in front of your face.
1 Corinthians 2:14 But the natural man receiveth not the things of the Spirit of God, for they are foolishness unto him; neither can he know them, because they are spiritually discerned.The natural man cannot even know the things of God until he has a spirit to discern them.
The verb tense is very specific. Whoever believes [present tense] has been [past tense] born of God.
Try again. Read the verse you are quoting, please.
How do you deal with Old Testament men of faith? The whole Holy Spirit experience of the new testament is a new thing. John 20 where Jesus breathes on the apostles and says to them "receive the Holy Spirit" indicates that people who were already men of faith were receiving/going to receive (depending on how interpreted) something new.
In fact, Jesus said "the Father will send the Comforter" and "when the Comforter comes," indicating again that this was to be future. This is later in John, yet in the 3rd Chapter he tells Nicodemus to be reborn. Was that informational, or was it possible for Nicodemus to have been reborn at that time?
So, again, how did this operate in the OT?
And, before the law, how did it happen with Abraham?
And what about that priest of Midian who became Moses' father-in-law....Jethro?