The Holy Ghost
The Holy Ghost/Spirit, is a spiritual part of God and an entity in its own right, which we receive if we truly repent and ‘Receive the Baptism’ (as I call it), having prayed for it. We cannot separate a piece of spirit from our spirit, which is also us, as we are human; but God can.
So the holy ghost/spirit was sent upon Mary and she conceived the son of God, though she is not the mother of God, as God was long before Mary and she did not bear God. This same Holy Ghost/Spirit will guide you in understanding the Gospel if you read it in truth to find out the truth, as it is God who calls all people to the Gospel. Whether you believe this or not, has no bearing on your salvation: for to do so is not a breach of a commandment.
The Apostles were Baptized with Fire and the Holy Ghost, unlike the other’s back then and us today, who baptize with water.
They then laid hands upon the followers of Christ: the baptized Christians, passing the Holy Ghost unto them.
Before one has been baptized ( meaning first repenting, then baptizing ) with the Baptism of Repentance, one cannot receive the Holy Ghost. Read this truth below. Jesus baptized, then prayed, then received the Holy Ghost. We then read that the same happened to the believers that followed him – the Christians.
LUK 11: 13 If ye then, being evil, know how to give good gifts unto your children: how much more shall your heavenly Father give the Holy Spirit to them that ask.
LUK 3: 21 Now when all the people were baptized, it came to pass, that Jesus also being baptized, and praying, the heaven was opened,
LUK 3: 22 And the Holy Ghost descended in a bodily shape like a dove upon him, and a voice came from heaven, which said, Thou art my beloved Son; in thee I am well pleased.
ACT 19: 1 And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples,
ACT 19: 2 He said unto them, Have ye received the Holy Ghost since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost.
ACT 19: 3 And he said unto them, Unto what then were ye baptized? And they said, Unto John’s baptism.
ACT 19: 4 Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.
ACT 19: 5 When they heard this, they were baptized in the name of the Lord Jesus.
ACT 19: 6 And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied.
It is a fact that those who receive the Holy Ghost back then started to speak with tongues. This ability was given to them so that they could preach in all tongues ( all languages ). I have not received any information of any one of the very few Christians today that would have received this ability also: and so I believe that we today do not receive this with the Holy Ghost.
Also, read the succession of the holy ghost to ‘Believers’ of today.