You don't have to understand it to be saved, but you will want to if you want to understand who God is.
The Father is the same as His Word being of the same Spirit. For a man and his word always reveals the man. That is why Jesus did not think it robbery to be equal with God.
1 John 5:7 For there are three that bear record in heaven,
the Father,
the Word/Jesus the Son, and
the Holy Ghost: and these three are one.
KJV
John 6:63 It is the spirit that quickeneth; the flesh profiteth nothing:
the words that I speak unto you, they are spirit, and they are life.
KJV
The Spirit is called the Spirit of life being the Breath of Life that God gives us making us of His bloodline. Our life is in our blood says God. This does not mean that you can only die if you loose your blood, because one can die in their sleep without shedding a drop. It means that the Spirit resides in our blood our DNA.
Rom 8:10 And if Christ be in you, the body is dead because of sin; but
the Spirit is life because of righteousness.
KJV
Jesus is the Word of life. The Word that God creates all things by and through. The Word became flesh and dwelt among us. He is the image of the invisable God. The Father does not create anything without His Word. The Father, His Word and Spirit are all One.
1 John 1:1 That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, of
the Word of life;
2(For
the life was manifested, and we have seen it, and bear witness, and shew unto you that eternal life, which was with the Father, and was manifested unto us
KJV
John 1:1 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.
3
All things were made by him; and without him was not any thing made that was made.
4
In him was life; and the life was the light of men.
5 And the light shineth in darkness; and the darkness comprehended it not.
KJV
The Word(Jesus) is the Seed of God. When we plant the Word of God into our eyes, ears it gets down in our heart and begins to grow. The Spirit of God works in us with the Word by planting the Seed in our hearts writing the Word upon our WILLING hearts. We are then growing into the image of Christ, becoming a son of God who rejects sin in our life for the Spirit does not leed us to the bondage of sin. Born again of the Spirit by the Word
Rom 8:14 For as many as are
led by the Spirit of God, they are the sons of God.
15 For ye have not received the spirit of bondage again to fear;
but ye have received the Spirit of adoption, whereby we cry, Abba, Father.
16 The
Spirit itself beareth witness with our spirit, that we are the children of God:
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1 John 3:9 Whosoever is born of God
doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.
10 In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother.
11 For this is the message that ye heard from the beginning, that we should love one another.
KJV
Luke 8:11
11 Now the parable is this:
The seed is the word of God.
KJV
1 Peter 1:23
23 Being
born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.
KJV
Blessing