Nearly ten centuries before Christ, the prophet Joel prophesied about the outpouring of the Holy Spirit on ALL mankind.
Joel 2:28-32 NLT
 “Then, after doing all those things, I will pour out my Spirit upon ALL PEOPLE. Your sons and daughters will prophesy. Your old men will dream dreams, and your young men will see visions.
Then, while He was on earth, Jesus revealed the meaning of the prophecy.
John 14:16-17 NIV
 And I will ask the Father, and he will give you another advocate to help you and be with you forever—
In other words, the prophecy that came through the prophet Joel meant that God will give His Holy Spirit to help humans; to teach them all things; to guide them into all the truth—among other things.
And seven days after Jesus went back to where He came from, the prophecy was fulfilled in the temple courts on the day of Pentecost.
Acts 2:14-21 NIV
 Then Peter stood up with the Eleven, raised his voice and addressed the crowd: “Fellow Jews and all of you who live in Jerusalem, let me explain this to you; listen carefully to what I say.  These people are not drunk, as you suppose. It’s only nine in the morning!  NO, THIS IS WHAT WAS SPOKEN BY THE PROPHET JOEL: “ ‘In the last days, God says, I will pour out my Spirit on ALL PEOPLE. Your sons and daughters will prophesy, your young men will see visions, your old men will dream dreams.
So, God has poured out His Spirit on ALL PEOPLE.
Today, the Holy Spirit is on ALL PEOPLE.
That includes you.
It includes me.
And it includes every single human on the face of the earth.
Glory be to God.