As mentioned in the first post (which can be found here), the Old Testament does not specifically point to the full doctrine of the Trinity. However, it does contain a huge amount of evidence for what can be called a “Multi-personal God”- meaning that it clearly teaches that there is only one true God and yet at the same time this God is somehow made up of multiple, separate persons.
As with the first post, we needn’t go any further than Genesis 1 in our search for scriptural support of this idea.
In Genesis 1:26 God said
“Let us make man in OUR image, after OUR likeness”
Right here at the moment of creation, in His very own words, God indicates that there is some aspect of His being that is multi-personal. Not only from the use of the plural word “Our” but also in the very fact that there is a discussion going on between multiple persons regarding the next step in His creation i.e. the creation of humanity in His image. We know from numerous references that God carried out the work of creation single handedly (for example, see Isaiah 44:24, Jeremiah 27:5, Nehemiah 9:6). But despite this, God does not say “I will make man in My image”, but rather “Let US make man in OUR image”. Again, notice not only the plural language, but keep in mind that fact that this is a conversation between a multiple set of personal agents who are involved in the work of creation
A common objection to this is that God is using a form of speech known as the “Plural of majesty”. This is where a person in a high official position such as a King, Queen, Pope or Emperor will call themselves “We” in some formal situations or contexts.
There are a lot of problems with this argument, but the main one is that scholars of Hebrew and of studies of the Ancient Near East point out that this form of speech did not exist in their language or history. For example, Claus Westermann, Old Testament Professor at Andrews University, says “The Plural of Majesty does not occur in Hebrew”. Nathan Stone, lecturer in Jewish Studies at the Moody Bible institute, in his classic book The Names of God wrote “….such use of the plural was not known then. We find no king of Israel speaking of Himself as ‘we’ or ‘us'” There are many other examples but I’m sure you get the point
No matter how much someone may try to argue against it, in Genesis 1:26 we clearly have God referring to Himself in His own words using plural pronoun- language that undeniably points to some sort of multi-personal state of being within God.