7. The Birth of Jesus Christ: Why of the Holy Ghost and of a Virgin?

There are several reasons that give us an answer to this question:

1. The pre-existence of Jesus Christ before his birth on earth

Before he came on this earth as the man Jesus Christ, he existed already as the Son of God, born before the creation of the universe:

“1 In the beginning was the Word, and the Word was with God, and the Word was God.
2 The same was in the beginning with God.
14 And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
15 John bare witness of him, and cried, saying, This was he of whom I spake, He that cometh after me is preferred before me: for he was before me.”

(John 1.1,2,14,15)

“58 Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am.”

(John 8.58)

“15 Who is the image of the invisible God, the firstborn of every creature:
16 For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him:
17 And he is before all things, and by him all things consist.”

(Colossians 1.15-17)

After Mary became pregnant of the Holy Ghost, she gave birth to Jesus, the one and the same who, before this birth on earth, existed as the Son of God.
Thus Jesus was born on this earth of the Holy Ghost as a human and is therefore God even on earth.

2. The continuity of his existence also in human form in order to become this way the Saviour of mankind

Jesus had to come into this world as man, continuing his existence that he already had before his birth on earth.

The reason for his birth on earth as a human has been that he had to become the Saviour of mankind, sent by God:

“38 For I came down from heaven, not to do mine own will, but the will of him that sent me.
39 And this is the Father's will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day.
40 And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day.”

(John 6.38-40)

3. The credibility of Jesus’ birth of the Holy Ghost as his Father

His birth of the Holy Ghost and of a virgin was a proof of credibility before the whole world that the newborn is by no means the son of Joseph or of any other man.

In the present case it was a pre-existing being that was to come into the world – now also in human form – namely God Himself, born of the Holy Ghost.

“18 Now the birth of Jesus Christ was on this wise: When as his mother Mary was espoused to Joseph, before they came together, she was found with child of the Holy Ghost.
19 Then Joseph her husband, being a just man, and not willing to make her a publick example, was minded to put her away privily.
20 But while he thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost.
21 And she shall bring forth a son, and thou shalt call his name JESUS: for he shall save his people from their sins.”

(Matthew 1.18-21)

“30 And the angel said unto her, Fear not, Mary: for thou hast found favour with God.
31 And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS.
34 Then said Mary unto the angel, How shall this be, seeing I know not a man?
35 And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.“

(Luke 1.30,31,34,35)