Is the Trinity/Elohim the invisible Godhead?
Yes. The Trinity, identified as the Elohim of the Old Testament, was the invisible Godhead, its spirit. Out of that invisible Trinity one person of the Godhead took on flesh and became visible, namely God the Son, the Lord Jesus, who is the image of the invisible God.
Les teaches that the pronoun 'who' refers to the Son in verse 13, whose blood was given for our redemption and forgiveness in verse 14. Paul then asks who is the image of the invisible God. God is invisible; the Trinity, the Elohim of the Old Testament, was that invisible Godhead, its spirit. But out of that invisible Trinity stepped one person of the Godhead, and He took on flesh and became visible. This is God the Son, Lord Jesus as we know Him, the image or visible appearance of the invisible God. He is the firstborn of every creature, before anything else ever was. By Him all things were created in heaven and earth, visible and invisible, thrones, dominions, principalities, powers; everything was created by Him and for Him. Les warns that bringing this person of the Godhead down to the level of other gods is blasphemy. He is the Creator, and one day every human being will know Him; the lost will meet Him at the great white throne.
Who is the image of the invisible God, the firstborn of every creature:
How did one person of the invisible Trinity become visible?
Out of the invisible Trinity, one person of the Godhead stepped forth, took on flesh, and became visible. That person is God the Son, the Lord Jesus, who is the image and visible appearance of the invisible God, the firstborn before all creation.
What is the Elohim of the Old Testament?
The Elohim of the Old Testament is the invisible Godhead—the Trinity in Spirit form. The Son is the image of the invisible God, and out of that invisible Trinity one person of the Godhead took on flesh and became visible, namely the Son.