There is only one God, and that He is eternally existent in Three Persons: Father, Son, and Holy Spirit.
God the Father is the Creator of the universe. He created man in His own image for fellowship, and called man back to Himself through Christ after the rebellion and fall of man.
Jesus Christ is eternally God. He was together with the Father and the Holy Spirit from the beginning, and through Him all things were made. He left Heaven and became incarnate by the Holy Spirit of the Virgin Mary; henceforth, He is forever one Christ with two natures–God and man–in one Person.
The Holy Spirit
The Holy Spirit is God, the Lord, and giver of life, who was active in the Old Testament, and given to the Church in fullness at Pentecost. He empowers the saints for service and witness, cleanses man from the old nature, and conforms us to the image of Christ.
Baptism of the Holy Spirit
The baptism in the Holy Spirit with evidence of speaking in tongues, subsequent to conversion, releases the fullness of the Spirit, and is evidenced by the fruits and gifts of the Holy Spirit.
The Word of God
The Bible, containing the Old and New Testament, is alone the only infallible, inspired Word of God, and that its authority is ultimate, final, and eternal. It cannot be added to, subtracted from, or superseded in any regard. The Bible is the source of all doctrine, instruction, correction, and reproof. It contains all that is needed for guidance in godliness and practical Christian conduct.