For more than 3,000 years, Jews have repeated Deuteronomy 6:4, “Hear, O Israel: The Lord our God is one Lord.” This sacred passage is called the Shema (pronounced shaw-mah and is named after the Hebrew for its first word) and has been held in high esteem and memorized by devout Jews for centuries. Trinitarians who believe there are 3 gods say, if the Bible says there is only one God then all three must be one, and yet others say if there is only one God, then how can God be composed of three beings? If Christians could only accept the simple words of Scripture instead of reading into it and trying to make Scripture say something it does not say.
When Moses said, “The Lord our God is one,” Israel was surrounded by polytheistic nations that worshiped many gods. In Deuteronomy chapter 6, Moses exhorts Israel to hear God and to keep His Commandments. And what Commandment was the most broken in Old Testament times? Idolatry! Polytheism is seen rampant all through the Old Testament and hence God constantly rebuking Israel for idolatry. They worshipped many false Gods including the sun and the moon as male and female deities. As a result, every devout Jew recites the Shema twice every day, and still do to this very day to keep up the great ancient national protest against the polytheisms and pantheisms of the heathen world. It is the great utterance of the national faith in One Jehovah!