Nuggets from An Urgent Call to a Serious Faith by Dave Hunt –Singularity and Plurality
Moreover, if God is a single Being, then why is the plural Hebrew noun "elohim" (literally "gods") used for God repeatedly? In fact, this plural noun is in the center of Israel's famous confession of the oneness of God. The Shema declares, "Hear, O Israel, The Lord our God is one Lord" (Deut 6:4; Mark:12:29). In the Hebrew it reads, "Jehovah our elohim [gods] is one [echad] Jehovah." The Hebrew word echad allows for a unity of more than one. For example, it is used in Genesis:2:24 where man and woman become one flesh, in Exodus 36:13 when the various parts "became one tabernacle," and in 2 Samuel:2:25 when many soldiers "become one troop."
Nor is the word elohim the only way in which God's plurality is presented. For example: Psalm:149:2: "Let Israel rejoice in him that made him" (literally "makers") Ecclesiastes:12:1, "Remember now thy Creator (literally "makers, husbands"). Unitarianism has no explanation for this consistent presentation of God's plurality all through the Old Testament. Although the word "Trinity" does not occur in the Bible, the concept is clearly there, providing the unity and diversity which makes possible the love, fellowship, and communion within the Godhead. Truly the Trinitarian God is love - and He alone.