Revelation 15: 4: Who shall not fear thee, O Lord, and glorify thy name? for thou only art holy: for all nations shall come and worship before thee; for thy judgments are made manifest.
The trinity teaching of three persons in the Godhead falls apart when reading the above verse. When God is sitting on His Thone being worshipped, He is said to be the only one who is holy. The Holy Spirit therefore cannot be separate to God the Father, for when Mary was found with child, the Father of the child was the Holy Spirit (Matthew 1: 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.). So then, the Father, the Son, and the Holy Spirit are but expressions of the one God who alone is holy.