They didn't need the NT to tell them about the Holy Spirit because they had the OLD TESTAMENT to tell them about Him.
Psalm 51:11 Cast me not away from your presence, and take not your Holy Spirit from me.
Isaiah 63:10-11 But they rebelled and grieved his Holy Spirit; therefore he turned to be their enemy, and himself fought against them. Then he remembered the days of old, of Moses and his people. Where is he who brought them up out of the sea with the shepherds of his flock? Where is he who put in the midst of them his Holy Spirit,
Your type doesn't follow God's Holy Spirit.
Whatever feelings and delusions your type follows, if it doesn't line up with Scripture, it isn't the HOLY Spirit.
where is it written that they studied and depended on the old testament as they went from town to town saving people? with and without Jesus....you are simply wrong. Bible idolatry is what you have done..shame on you.