God is one

37. Why does one profess belief that there is only one God?
200-202
228

Belief in the one God is professed because he has revealed himself to the people of Israel as the only One when he said, “Hear, O Israel, the Lord our God is one Lord” (Deuteronomy 6:4) and “there is no other” (Isaiah 45:22). Jesus himself confirmed that God is “the one Lord” (Mark12:29). To confess that Jesus and the Holy Spirit are also God and Lord does not introduce any division into the one God.