In Deuteronomy, chapter 6, Moses gives the “Great Commandment” of God to Israel. In verse 4, he states:
“Hear, O Israel: The Lord our God is one Lord:”
He then goes on in verses 7-25 to expound upon how they must always remember this commandment when they enter into the promised land; and that it will go well for them if they do, but grievous for them if they do not.
Have you ever considered what that one line actually says? As a Christian, we know that God the father, God the Son, and God the Holy Ghost are separate, yet unified as one Being, our God. I would liken it to a Olive tree which is made up of the wood, the leaves, and the fruit. All separate components making up the tree.
If you go to any Hebrew site, you will find out that this verse is central to all Jews. On the site “Hebrew for Christians“, we read the following:
“The core Hebrew prayer. Special emphasis is given to the first six Hebrew words of this passage (Shema Yisrael, Adonai eloheinu, Adonai echad) and a six-word response is said in an undertone (barukh shem kevod malkhuto le’olam va’ed). After a pause, Deuteronomy 6:5-9 is then recited, which stresses the commandment to love the Lord your God with all of your heart, soul, and might.”
It also states the first line (“Hear Oh Israel, the Lord our God is One“) as:
Shema Yisrael Adonai Eloheinu Adonai echad.
Yisrael (“O Israel”)
Adoinai (“The Lord”)
Eloheinu (“our God (is)”)
Adonai Echad (“God, one”)
Note that word “Echad”. From the same site, we read:
“This statement marks the declaration that LORD our God is One. Interestingly, the word echad in Hebrew can imply a unity in diversity (the word for one and only one, i.e., unique, is more often rendered as yachid). For example, in Exodus 26:6 the various parts of the Tabernacle (mishkan) are to be constructed so that “it shall be one (echad) tabernacle,” and Ezekiel spoke of two “sticks” (representing fragmented Israel) as being reunited into one: “and they shall be one (echad) stick in My hand” (Ezek. 37:19). Moses also used echad in Genesis 2:24 when he wrote, “And they (husband and wife) will become one flesh (basar echad).”
In other words, Echad is plural (i.e., more than 1), and means various parts making up ONE thing. For instance, If they were to have meant that The Lord God is one (i.e., one solitary thing), they would’ve used the word yachid.
So, from the earliest books in the Bible, back in the Old Testament, just as Jesus Christ said of Himself, The Lord, Our God, is ONE (Father, Son, Holy Spirit).
You should also know that, after Jesus Christ’s ministry, the word Echad was replaced with Yachid (Talmud). If the Jewish scholars did not accept the argument that God is one, made up of three, then they would’ve used their teachings to counter this claim. However, what they did was change the word from the Book of Deuteronomy, to a word that always means one (Yachid).
As I firmly believe, and try to impress on this site, the entire Bible (Old as well as New Testament), is but God’s plan revealing both our fallen nature that made us separate from Him, and the ONLY way to redeem ourselves back to him. That plan from the beginning was His son, Jesus Christ.
You can read a deeper explanation of the words “Echad” and “Yachid” at the following site: