This is a key moment in this story. The beginning of John 1 explained that the Lord is perfect, infinite love which gave itself expression as divine truth. The duality of love and expression formed a template for humanity, which meant that the Lord’s duality made him the ultimate, divine human. It showed that the divine truth was the power of creation, and that the Lord shared that truth with humanity from the outset, so that people could receive His love and return it. But people kept turning away, and the Lord had to keep expressing his love in more and more external forms to maintain a connection.

By mentioning John the Baptist, the chapter showed that the Jews of the time still had the truth – the Lord’s Word – contained inside the rough-hewn images of the Old Testament. But they were so steeped in evil loves and false thinking that the connection to the Word – to the love within the Old Testament – was about to be snipped forever.

So the Word became flesh. The Lord passed the full expression of His love and His full humanity into physical flesh as Jesus. That way He could once again show the life within the existing Scriptures and could make His own life and His own words part of an expanded expression of truth for a new age of humanity. People could no longer see and feel the Lord’s love through the Old Testament, but they could see and feel it in the face and hands and words of Jesus.

The "glory" here expresses the blinding brilliance of that truth. The "Father" represents the Lord’s actual love itself, and being "begotten" means that the love was expressed in the form of truth. Being full of "truth" has a pretty obvious meaning, but "grace" means an affection, a love for what is true.

The Lord had to come. He had to let His humanity flow down into the flesh, into the most external of forms, because that was the only way we were going to see and embrace it.

(Referenser: A Brief Explanation of the Teachings of the New Church 117; The Apocalypse Explained 1069 [3]; The Word 20; True Christian Religion 3, 85)

1069. Verse 12. And the ten horns which thou sawest are ten kings, signifies the truths of the Word as to power. This is evident from the signification of "horns," as being the power of truth (See n. 316, 567, 776, 1041). There were "ten horns" because "ten" signifies many persons and many things, likewise all persons and all things (See above, n. 675); therefore "ten horns" signify, in reference to the truths of the Word, all power. Also from the signification of "ten kings," as being the truths of the Word and thus of the church (of which frequently above). In these three verses, and in verses 16 and 17, the signification of "the ten horns of the beast" is explained, namely, that they are those Divine truths that the Babylonish nation has profaned, which are especially, that the Lord has authority over heaven and earth, and that the Word alone is holy and Divine; for these two truths make the church itself of the Lord on earth, for the church is a church from this that the Lord is adored and that the Word is read. For the Lord reforms man, and the Word teaches how man must live that he may be reformed by the Lord; therefore if these two truths are not acknowledged and received the church itself perishes, for upon these two truths the church is founded. It was for this reason that it came to pass through the Divine Providence of the Lord that certain churches separated themselves from the Babylonish, and these acknowledge the Lord's Divine power over heaven and earth to be equal to the power of God the Father, and also attribute Divine holiness to the Word alone. This was provided by the Lord in order that the Christian Church in the European world might not be utterly overthrown. That this is the signification of "the ten horns which are ten kings" will appear from what follows.

(Continuation respecting the Word)

[2] Since the Word is the Divine truth, and this proceeds from the Lord's Divine Being [Esse] as light proceeds from the sun, it follows as a consequence that the Lord is the Word because He is the Divine truth. The Lord is the Word, because He is the Divine truth, and this proceeds from His Divine Being [Esse], which is the Divine love, because the Divine love was in Him when He was in the world as the soul is in its body; and as the Divine truth proceeds from the Divine love as light proceeds from the sun, as has been said, therefore the Lord's Human in the world was the Divine truth proceeding from the Divine love that was in Him. That the Divine Itself, which is called "Jehovah" and the "Father," and which is the Divine love, was in the Lord from conception, is evident in the Gospels of Matthew and Luke. In Matthew from these words:

When Mary the mother of Jesus had been betrothed to Joseph, before they came together she was found with child of the Holy Spirit. And the angel said to Joseph in a dream, Fear not to take unto thee Mary thy wife, for that which is begotten in her is of the Holy Spirit. This came to pass that it might be fulfilled which was said of the Lord by the prophet, Behold the virgin shall be with child, and shall bring forth a son. And Joseph knew her not until she had brought forth her firstborn son; and he called His name Jesus (Matthew 1:18-25).

And in Luke from these words:

The angel said to Mary, Behold thou shalt conceive in the womb, and bring forth a son, and shall call His name Jesus; He shall be great, and shall be called the Son of the Most High. But Mary said unto the angel, How shall this be, seeing I know not a man? The angel answered her, The Holy Spirit shall come upon thee, and the power of the Most High shall overshadow thee; wherefore also the Holy One that shall be born of thee shall be called the Son of God (Luke 1:30-35).

It was because He was conceived of Jehovah that He is so frequently called in the Word "the Son of God," and Jehovah is called His "Father." Jehovah as to His Being [Esse] is the Divine love, and as to His Existing [Existere] He is the Divine good united to the Divine truth.

[3] From this it can be seen what is meant by:

The Word that was with God and that was God, and also was the light that enlighteneth every man (John 1:1-10),

namely, that it was the Divine truth proceeding from the Lord, thus the Lord as to His Existing [Existere]. That the Lord as to His Existing [Existere] was Divine truth, and that this was His Divine Human, because this existed from His Divine Being [Esse] as the body from its soul, these words in John clearly certify:

The Word became flesh and dwelt among us, and we beheld His glory, the glory as of the only-begotten of the Father (John 1:14).

"The Word" is the Divine truth, which also is "glory;" "flesh" means the Divine Human, "the only-begotten of the Father" means that which exists or proceeds from the Divine Esse in Him.