Our finite minds can apprehend God as a triune being without fully comprehending Him in His fullness. The same is true when trying to wrap our minds around the definition of eternity.
I like to explain the Triune God in two ways: by comparing Him to time (past, present, future) and space (length, width, and height).
What is commonly believed within Christian circles in regard to the doctrine of the Godhead (Trinity) makes four basic assertions:
1. There is one and only one true and living God.
2. This one God eternally exists in three Persons—God the Father, God the Son, and God the Holy Spirit.
3. These three Persons are completely equal in attributes, each with the same divine nature. You could say one, in essence.
4. Each Person is fully and completely God, but the Persons are not identical.
In Genesis 1, God describes Himself with both singular and plural pronouns. God here is making the point that He, in one context, is singular, and in another context, is plural.
Genesis 1 is where we see the first Biblical proclamation of the doctrine of The Godhead, which is commonly referred to as The Holy Trinity.
God is one essence who is expressed through three eternally existing persons: God the Father, God the Son, and God the Holy Spirit.
In Genesis 1, the word used for God in the original Hebrew is Elohim, which means the uni plural One.
Theologians through the centuries have racked their brains in a quest to formulate a doctrinally sound, fully satisfying illustration of the Triune Godhead.
Studying God’s Word, growing in our relationship with Him, and trying to gain a deeper understanding of Him and His ways and attributes are good things for a Christian to do.
However, we must remember that God is transcendent, and some of His qualities are unknowable (Isaiah 55:8–9).
“For My thoughts are not your thoughts,
Nor are your ways My ways,” declares the Lord.
9 “For as the heavens are higher than the earth,
So are My ways higher than your ways
And My thoughts than your thoughts.