The Bible is God’s written revelation of Himself to us and is the authoritative rule of faith and conduct. The Bible, composed of the Old and New Testaments, is authoritative in such a way that to believe and obey it or to disbelieve and disobey it, is to believe and obey or disbelieve and disobey God (2 Tim 3:16).
There is One True God Existent as The Father, The Son, and The Holy Spirit.
God has always existed as three Persons revealed as the Father, the Son, and the Holy Spirit. Each person is fully God. Yet, there is one God. While difficult to understand, God is a being that is a trinity in nature (Matthew 3:16-17, 2 Corinthians 13:14).