This is not talking about the Baptism of the Holy Spirit. Have you ever asked Jesus into your heart?
Yes Christ dwells in my heart by faith and Jesus Christ is in all believers since Adam.
But Jesus mentions the Holy Spirit here. He did not say the Father will give Jesus Christ in their hearts here.
There are three that bear record in heaven the Father the Word and the Holy Ghost.
We also read.
John 7:39. (But this spake he of the
Spirit, which they that believe on him should receive: for the Holy Ghost was not yet given; because that Jesus was not yet glorified.)”
Acts 5:32. And we are his witnesses of these things; and so is also the Holy Ghost, whom God hath given to them that obey him.”
And consider
Mark 12:36. For David himself said by the Holy Ghost, The Lord said to my Lord, Sit thou on my right hand, till I make thine enemies thy footstool.”
Luke 1:15. For he shall be great in the sight of the Lord, and shall drink neither wine nor strong drink; and he shall be filled with the Holy Ghost, even from his mother's womb.”
All must have the Spirit of Christ , the (Spirit of Jesus Christ) to be saved but not all have the Holy Ghost (Holy Spirit) the same, or the Spirit of the Father.
In OT times the Holy Ghost was there in measure and a somewhat different ministration than the New Testament.
But the Spirit of the Father also spoke in all believers before the Holy Ghost baptism was given.As we read in Matthew 10
“ Matthew 10:20. For it is not ye that speak, but the Spirit of your Father which speaketh in you.”
Believers have both the Father and the Son
And we read of a Trinity of TriUnity
We read of the Spirit of the Father and the Spirit of the Son and the Holy Ghost (Holy Spirit).
And to be filled with the Spirit or have the Spirit come upon you in the OT times is different than the Spirit given without measure or baptized with the Holy Ghost.
We read about Spiritual power and aspects of the Holy Spirits work in the OT also.