The Father is God, “Remember the former things of old: for I am God, and there is none else; I am God, and there is none like me” (Isaiah 46:9).

The Son is God, “In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. 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” (John 1:1-2, 14).

The Holy Spirit is God, “But Peter said, Ananias, why hath Satan filled thine heart to lie to the Holy Ghost, and to keep back part of the price of the land? Whiles it remained, was it not thine own? and after it was sold, was it not in thine own power? why hast thou conceived this thing in thine heart? thou hast not lied unto men, but unto God” (Acts 5:3-4).