One God

This great truth it was God's purpose to keep steadily before the minds of the Jews; and to keep it in the world, and ultimately to diffuse it abroad among the nations, was one of the leading reasons why he selected them as a special people, and separated them from the rest of mankind. - Albert Barnes

He is eternal - the first and the last. He is God from everlasting, before the worlds were, and will be so to everlasting, when the world shall be no more. If there were not a God to create, nothing would ever have been; and, if there were not a God to uphold, all would soon come to nothing again. He is all in all, is the first cause, from whom are all things, and the last end, to and for whom are all things the Alpha and the Omega. He is God alone: Besides me there is no God. - Matthew Henry