They where filled with the holy spirit temporally.
So we have to conclude the holy spirit couldn't stay permanently because a new seed had to be born.
The new seed being the human mind that conquered sin. Jesus
Then that seed being passed down in the form of the fruits of the spirit.
But still who waters the fountain and who is the creator of all things
you see the purpose of asking that is anchored in the book of Hebrews chapter 1:1-2
"In the past God spoke to our ancestors through the prophets at many times and in various ways, 2 but in these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom also he made the universe"
so from this we learn one fundamental thing, God in times past was speaking as you have said through the Holy spirit which is true and one of the things God spoke to the ancestors was the message of salvation.
for example in the book of Ezekiel 34:23-24 "I will place over them one shepherd, my servant David, and he will tend them; he will tend them and be their shepherd. 24 I the Lord will be their God, and my servant David will be prince among them. I the Lord have spoken"
or Isaiah 49:6 "
he says:
“It is too small a thing for you to be my servant
to restore the tribes of Jacob
and bring back those of Israel I have kept.
I will also make you a light for the Gentiles,
that my salvation may reach to the ends of the earth.”
All this are messages of salvation that the Holy spirit communicated to the prophets now lets go the book of peter
1st Peter 1:10 "
Concerning this salvation, the prophets, who spoke of the grace that was to come to you, searched intently and with the greatest care, 11
trying to find out the time and circumstances to which the Spirit of Christ in them was pointing when he predicted the sufferings of the Messiah and the glories that would follow "
Now I want you to look at the highlighted texts carefully
Now we understand that when God was speaking through the Holy Spirit as you have correctly stated, it was the spirit of Jesus now this is not a different person ...The spirit of Christ was pointing in them the sufferings the Messiah would suffer....so why is the spirit of Christ not saying "these are the things I would suffer" The prophecy of the sufffering servant is a prime example how the Holy spirit(the spirit of Christ) predicted the suffering of the messiah and yet he doesnt say the things he (the Holy Spirit as a person ) would suffer and yet he is reffered to as the spirit of Christ ...Remember from the wordings it is his spirit(Christ's spirit) not a distinct person. His.