Old Testament both Jews and Christians have always interpreted the Bible (both the "Old" and "New" Testaments) as an affirmation of the oneness of Almighty God. The Old Testament stresses the special relationship between God and his chosen people, Israel, but includes instructions for proselytes as well. This relationship is expressed in the biblical covenant (contract) between the two, received by Moses. The law codes in books such as Exodus and especially Deuteronomy are the terms of the contract: Israel swears faithfulness to God, and God swears to be Israel's special protector and supporter. Further themes in the Old Testament include salvation,
Old Testament theology in the Old Testament book of Exodus 3:13-15. Through this passage, readers can see the personality of God revealed. Because the earliest writing in the Hebrew language did not utilize vowel marks and the Hebrew people revered God so much that they declined to pronounce the name aloud, the true pronunciation of the name of God has been lost due to a lack of use. Medieval Jewish scholars developed a system for inserting vowel marks into the consonantal text. Due to the tradition of reading aloud the word "adonai" (my Lord) whenever YHWH was encountered in the text, scribes inserted