This is the statement that He makes of Himself, through His Word.  We cannot change His word.  It will stand forever.

Psalms 119:89  LAMED. For ever, O Jehovah, thy word is settled in the heavens.
Isaiah 40:8  The grass withereth, the flower fadeth; but
the word of our God abideth for ever.
1Peter 1:25  But the word of the Lord endureth for ever. And this is the word which by the gospel is preached unto you.
1Peter 1:23  Being born again, not of corruptible seed, but of incorruptible, by the
word of God, which liveth and abideth for ever.

Though the word of God is true, me still worship the creature, or the created, and that which they have created with their own minds, instead of God as He has revealed Himself to man. 

Rom 1:22-25:  Professing themselves to be wise, they became fools, And changed the glory of the incorruptible God into an image made like to corruptible man, and to birds, and four-footed beasts, and creeping things. Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen.

Now, though there is not place in God's word that says that He is more the Holy One, or One, men insist that God has a multiple personality somehow contained in one "something that in not defined".  This is a man's definition.  If a man will study to show himself approved of God, he will find that of Himself, God says that He is one. 
The confusion came when Jesus Christ, or Jehovah-savior, or Yehoshua, of
YHVH-salvation, Joshua, or Yeshua Messiah came to walk this earth. 
The bible says that the Holy Ghost over-shadowed Mary and caused Mary to be with Child.  This is the first downfall of the doctrine of more than one.  If God's word is true, then
the Father is the Holy Ghost.  The Holy Ghost is the one that gave the supernatural seed for Jesus Christ to be born.
There is a doctrine that says that God is
two.  Jesus and the Holy Ghost.  It teaches that the Spirit of God (which God is a Spiri

and the Holy Spirit are the same.  He certainly would not be the un-holy spirit.  Because of this, it is  believed that the Father and the Son are two separate "persons".  Makes sense until Jesus Himself says "I and my father (which is the Holy Ghost) are ONE!"  Not to mention that He further says that when you've seen Him, you've see the Father.  He being the express image of the invisible God.  He is God looking in a mirror, would you say?  Can you be separated from your image, except to photograph or draw and paint it, then would this make you, who is in the image of God; two?
The big deal is that man forgets that
God is a Spirit.  A spirit itself has no body.  A body added to a spirit can make a, or ONE person.  Not three persons, or three persons in one god, just trying to figure out what the three are in.  Scripture teaches that the fullness of the God head is in Jesus Christ.  Not that Jesus Christ is in something, or