JESUS CHRIST and the apostles preached that:
GOD is one Being in three separate individuals called the Father, the Son and the Holy Spirit, and three separate individuals in One Being called God, Lord, Jehovah, Creator. The Father, the Son Jesus and the Holy Spirit lives from eternity to eternity. The Son came to the world to save men from sin, Satan and eternal death and give them eternal life, the life of God. On earth He bore the name Jesus Christ.

Matthew 28:19 KJV
Go ye therefore, and teach all nations, baptizing them in the name of the Farther, and of the Son, and of the Holy Ghost:

Mark 12:29 KJV
And Jesus answered him, The first of all the commandments is Hear, O Israel; The Lord our God is one Lord:

1 John 5:7 KJV
For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.