In fact, the Word of God naturally assumes this universal truth. Genesis 1:1, "In the beginning God created..." God here is the transliterated form of Elohim, which means “plenitude of might,” or more simply, “one God whose characteristics are many.” This thought is carried further in Deuteronomy 6:4, "Hear, O Israel: the LORD our God is one LORD." In Colossians 2:9 we are told that in Jesus dwells all the fullness of the Godhead (all the characteristics of God) bodily, and we (the Church) are complete in Him (Jesus).
When addressing Timothy, Paul wrote of a mystery, but then he further explained what that mystery was, "And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory” (1 Timothy 3:16). Only Jesus Christ fulfills those six points. Therefore, Jesus Christ of the New Testament is Elohim of the Old Testament, which further explains why we are told that Jesus Christ is the image of the invisible God and that all things exist and consist by him, Colossians 1:12-17.
So, we are dogmatic in our belief that there is only one God and Jesus is His name. He is our Creator, Sustainer, Redeemer, and Savior. Isaiah 9:6, "For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace." Only Jesus fulfills this messianic prophecy. He is the Father in Creation, the Son in Redemption, and the Holy Spirit in us today. Keep this great truth in mind and heart as you celebrate this Christmas season. Merry Christmas!
Bernard, David K. J.D. The Oneness of God. St. Louis: Word Aflame Press, 1983.
Reynolds, Ralph V. Truth Shall Triumph. Hazelwood, MO: Pentecostal Publishing House, 1965.