The Trinity is a Biblical concept

My position in this debate will be that the Trinity is a Biblical concept taught in the Bible. I will show in the Old Testament how God be made up of 3 persons. In Genesis, 1:1, it says "In the beginning, God (Elohim אֱלֹהִ׳ם) created the heavens and earth" In Hebrew, the name of God, Elohim is plural, thus it is rendered "Gods." Another common reference is in Genesis 1:26: 26 "Then God said, "Let Us make man in Our image, according to Our likeness; let them have dominion over the fish of the sea, over the birds of the air, and over the cattle, over all[a] the earth and over every creeping thing that creeps on the earth." Based on the rules of Hebrew grammar, if the subject is plural, the verb must also be plural which is exactly what we see. If God wanted to communicate to humanity that he was strictly one God, Moses would've only written YHWH ׳ה׳ה or the singular form of God: El or Eloah. In Deuteronomy 6:4, we see the plurality of God: "4 "Hear, O Israel: The Lord our God, the Lord is one (Echad אֶחָד)" Echad is a compound unity. If God wanted to strictly show that he is only one, he would've used the Hebrew Yachid, but since it is plural, that can only mean that Elohim is a plural of persons which isn't necessarily three, but lets consider the candidates for these people. There is a problem with proposing that Elohim is made of YHWH and his heavenly court. One is that angels are not in the image of God, nor are they equal with God. Some propose that Elohim is a plural of majesty in the sense of him being very great, however no where in the Old Testament does it support this. Dr. Gleason Acher, a scholar wrote: "This first person plural can hardly be a mere editorial or royal plural that refers to the speaker alone, for no such usage is demonstrable anywhere else in biblical Hebrew. Therefore, we must face the question of who are included in this "us" and "our." It could hardly include the angels in consultation with God, for nowhere is it ever stated that man was created in the image of angels, only of God. Verse 27 then affirms: "and God [Elohim] created man in His own image, in the image of God he created him; male and female He created them" (NASB). God--the same God who spoke of Himself in the plural--now states that He created man in His image. In other words, the plural equals the singular. This can only be understood in terms of the Trinitarian nature of God. The one true God subsists in three Persons, Persons who are able to confer with one another and carry their plans into action together--without ceasing to be one God." (Encyclopedia of Bible Difficulties, Gleason Archer, p.359, commenting on whether Gen 1:26 is a "plural of majesty") Rabbi Tzvi Nassi commented: "Every one who is acquainted with the rudiments of the Hebrew and Chaldee languages, must know that God, in the holy Writings, very often spoke of Himself in the plural. The passages are numerous, in which, instead of a grammatical agreement between the subject and predicate, we meet with a construction, which some modern grammarians, who possess more of the so-called philosophical than of the real knowledge of the Oriental languages, call a pluralis excellentiae. This helps them out of every apparent difficulty. Such a pluralis excellentiae was, however, a thing unknown to Moses and the prophets. Pharaoh, Nebuchadnezzar, David, and all the other kings, throughout TeNaKh (the Law, the Prophets, and the Hagiographa) speak in the singular, and not as modern kings in the plural. They do not say we, but I, command; as in Gen. xli. 41; Dan. iii. 29; Ezra i. 2, etc." (Rabbi Tzvi Nassi, Oxford University professor, The Great Mystery, 1970, p6, ) Scholar Claus Westermann wrote: "there are no certain examples of plurals of majesty with either verbs or pronouns ... the verb used in Gn 1:26 ("ā"7;āh) is never used with a plural of majesty. There is no linguistic or grammatical basis upon which the "us" can be considered to be a plural of majesty." (Hasel, "The Meaning of "Let Us" in Gn 1:26," Andrews University Seminary Studies 13 (1975), 63-64) The only 3 possible and likely candidates are Jesus and the Holy Ghost since the Holy Ghost is part of God and based on the fact that the Messiah is divine. Psalm 110 in the Septuagint reads as follows: 1 "A Psalm of David. The Lord said to my Lord, Sit thou on my right hand, until I make thine enemies thy footstool. 2 The Lord shall send out a rod of power for thee out of Sion: rule thou in the midst of thine enemies. 3 With thee is dominion in the day of thy power, in the splendours of thy saints: I have begotten thee from the womb before the morning. 4The Lord sware, and will not repent, Thou art a priest for ever, after the order of Melchisedec. 5 The Lord at thy right hand has dashed in pieces kings in the day of his wrath. 6 He shall judge among the nations, he shall fill up the number of corpses, he shall crush the heads of many on the earth. 7 He shall drink of the brook in the way; therefore shall he lift up the head." Thus we can conclude that the Trinity is a Biblical concept made of the Father, Son, and Holy Ghost.