Chandler Jones wrote, “The New Testament describes our Lord as ‘monogenes’ in Greek, “only-begotten.” This term designates the mysterious and eternal relationship of the Son to the Father within the communion of the Trinity. The Son has for all eternity come out from the Father and derives his eternal existence, his generation, from the Father, the sole Origin, Source and Fountain of Trinitarian life.
The words of the Nicene-Constantinopolitan Creed (381 AD) purposely utilize the language of the New Testament regarding the Person of our Lord and declares that the Lord Jesus Christ is “one Lord, the only-begotten Son of God, begotten of his Father before all worlds, God of God, Light of Light, very God of very God, begotten, not made, being of one substance with the Father, by whom all things were made…” From all eternity, the Son derives his eternal being, glory and majesty from the Father’s essence. He is eternally born of the Father, co-equal, and co-eternal. Begotten means “from God forever,” eternal generation from the Father, not a created status.”
“And the Word became flesh, and dwelt among us, and we saw His glory, glory as of the only begotten from the Father, full of grace and truth. No one has seen God at any time; the only begotten God who is in the bosom of the Father, He has explained Him.”
(Gospel of John 1:14,18)
“I and the Father are one.” Jesus