After the autumn , man lost the Holy Ghost in his soul and body.
He didn't recover it again until the approaching of Christ, Who, being God Himself, breathed the Holy Ghost into the souls of His disciples on the day of his Resurrection.
Each folks receives the Holy Ghost again through Holy Baptism.
Sample text. Click In the Old Testament , the prophets received their prophecies “through the Holy Spirit”, as we are saying within the Creed. that they had visions from outside themselves.
However, the Christian after Baptism can receive visions and prophecies from within himself, since the Holy Ghost is now within him. because the Lord said:
“The Kingdom of God [another name for the Holy Spirit] is within you”.
And so within the Old Testament God was above or outside us.
But when God became man He was with us.
And since Pentecost and therefore the descent of the Holy Ghost into Christians at Holy Baptism, he's in us.
In the Garden of Eden we were forbidden to eat of the Tree of the Knowledge of excellent and Evil, but now God invites us to eat of the Living Tree,
the Tree of Life.
At the Last Supper Christ instituted the New Covenant with us, having warned us that unless we eat of His Body and drink of His Blood, we've no life eternal in us.
We partake of the attribute of Christ, which is united to His Divine Nature, and during this way we enter into Him and He into us.
Christ said: “I am the Way”, which is Himself. He didn't say: “I am the way that you simply should follow”, but “I am the Way, you ought to be in Me as i will be able to be in you.”