Jesus Christ is “the Son of God”, begotten of God the Father – Psalms 2:7, Hebrews 1:2-8, John 3:16, etc. Also, Jesus Christ is the Word of God, the Holy Spirit – John 1:14, 2 Peter 1:21, Revelation 19:13, etc. Also, Jesus Christ is God, the Creator – Hebrews 1:2, John 1:3, Colossians 1:14-18, etc.
Accordingly, the Father, the Son and the Holy Spirit are three and also one. This is the Holy Trinity, which is expressly stated in 1 John 5:7 and John 1:1-2, and implied in Isaiah 9:6, Genesis 1:1 (when read in Hebrew), Genesis 1:26, etc.
To add to this, Jesus Christ was made man, through the Holy Spirit and the Virgin Mary – John 1:14, Galatians 4:4-5, Luke 1:31-35, etc. And thus Jesus Christ was and is also “the Son of man” – Luke 9:22, Mark 14:61-62, Matthew 24:27, etc.
Arianism, which spread into Europe, was stamped out by the Franks. Nestorianism, which spread throughout the Middle East and Persia, was curbed by the rise of Islam; even the Nestorianism that reached Tang dynasty China was eventually eradicated by the Tang rulers of China towards the end of their dynasty. And the Byzantine church was sacked by crusaders en route to Jerusalem in 1204 AD, and then absorbed by the Ottomans when Constantinople fell in 1453 AD. On every occasion, heretical Christology was ultimately halted.
In effect, an anti-Trinitarian is one denies the divinity of Jesus Christ. To understand Christianity and to be a Christian, one must not disregard or discount any part of the Bible. Every part fits together to form a cohesive whole.
You should know that Islam is anti-Trinitarian, because Muslims believe God cannot have a son, and God cannot incarnate in man. Muslims believe Jesus was merely a prophet.
Besides that, the Mormons, the Seventh Day Adventists and the Jehovah Witnesses – cults pretending to be denominations of Christianity – all happen to be anti-Trinitarian. All these suppose the Father, the Son and the Holy Spirit are three distinct beings. By contrast, the Trinity means the three are three and also one.
Some people mistakenly think the birth of Jesus through the virgin Mary was the moment when Jesus was begotten as the Son of God. This is not so. Jesus is the Alpha and the Omega, from everlasting and to everlasting.
“I am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, the Almighty.”
– Revelation 1:8
“I am Alpha and Omega, the beginning and the end, the first and the last.”
– Revelation 22:13
My understanding is that the 4 dimensions of space and time, within which the universe exists, were created by God – the big bang, as it were – and this explains how God is eternal, or in other words, from everlasting and to everlasting.
The birth of Jesus through Mary was the moment when the Word of God was made flesh, John 1:14 – the incarnation of God. Jesus was begotten as the Son of God from the beginning, well before the creation of the world.
“The LORD possessed me in the beginning of his way, before his works of old. I was set up from everlasting, from the beginning, or ever the earth was. When there were no depths, I was brought forth; when there were no fountains abounding with water. Before the mountains were settled, before the hills was I brought forth: While as yet he had not made the earth, nor the fields, nor the highest part of the dust of the world. When he prepared the heavens, I was there: when he set a compass upon the face of the depth: When he established the clouds above: when he strengthened the fountains of the deep: When he gave to the sea his decree, that the waters should not pass his commandment: when he appointed the foundations of the earth: Then I was by him, as one brought up with him: and I was daily his delight, rejoicing always before him; Rejoicing in the habitable part of his earth; and my delights were with the sons of men.”
– Proverbs 8:22-31
In Revelation 22:16, Jesus says he is the root and the offspring of David: the Son of God and the Son of man. Likewise, before Abraham was, Jesus existed, John 8:58.
“I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the bright and morning star.”
– Revelation 22:16
“Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am.”
– John 8:58
Jesus was the first begotten of the Father, Hebrews 1:6. But Jesus is not an angel. He is more than an angel: he is the Prince of princes, Daniel 8:25; or put differently the God of gods, Psalms 136:2.
“For unto which of the angels said he at any time, Thou art my Son, this day have I begotten thee? And again, I will be to him a Father, and he shall be to me a Son? And again, when he bringeth in the firstbegotten into the world, he saith, And let all the angels of God worship him. And of the angels he saith, Who maketh his angels spirits, and his ministers a flame of fire. But unto the Son he saith, Thy throne, O God, is for ever and ever: a sceptre of righteousness is the sceptre of thy kingdom.”
– Hebrews 1:5-8
Angels have power to cast fire out of heaven, Job 1:16 and Revelation 13:13; angels have power to direct the wind, Job 1:19; angels have power to smite a person with disease, Job 2:7; angels even have power to make a molten image speak as if were alive, Revelation 13:15; but angels do not have power to create life, nor do they have power to heal the sick or resurrect the dead. Those who say Jesus is but an angel in effect work to diminish God and elevate Satan.
Jesus said in John 14:6 that he is “the way, the truth and the life”: no man cometh unto the Father, but by him. 1 Timothy 2:5 says, Jesus is the mediator between God and men. What is more, God the Father judges no man; it is the Son of God who judges, John 5:22-23. Christ is the one who has power to grant eternal life and power to damn, John 5:27-29.
“For the Father judgeth no man, but hath committed all judgment unto the Son: That all men should honour the Son, even as they honour the Father. He that honoureth not the Son honoureth not the Father which hath sent him.”
– John 5:22-23
“And hath given him authority to execute judgment also, because he is the Son of man. Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice, And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.”
– John 5:27-29
In Revelation 14:14, it is the Son of man who reaps the harvest. Jesus decides whom will be raptured and whom will be left behind. Furthermore, ultimately it is Jesus who treads the winepress of the wrath of God, Revelation 14:10 and Isaiah 63:3.
Something that I discovered recently is that the very first line of the Bible, Genesis 1:1, implies and explains the Trinity, when read in Hebrew, paying attention to Hebrew grammar: God is plural and singular at the same time!
“In the beginning God created the heaven and the earth.”
– Genesis 1:1
It follows from this that the Trinity is true and Jesus is the Creator, as explained in the New Testament, namely John 1:1-3, Hebrews 1:2, Colossians 1:12-18, etc.
“In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made.”
– John 1:1-3
“Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;”
– Hebrews 1:2
“Giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light: Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son: In whom we have redemption through his blood, even the forgiveness of sins: Who is the image of the invisible God, the firstborn of every creature: For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him: And he is before all things, and by him all things consist. And he is the head of the body, the church: who is the beginning, the firstborn from the dead; that in all things he might have the preeminence.”
– Colossians 1:12-18
Now, in case you are thinking God the Father and Jesus the Son of God are merely one person, consider Revelation 5:1-7.
“And I saw in the right hand of him that sat on the throne a book written within and on the backside, sealed with seven seals. And I saw a strong angel proclaiming with a loud voice, Who is worthy to open the book, and to loose the seals thereof? And no man in heaven, nor in earth, neither under the earth, was able to open the book, neither to look thereon. And I wept much, because no man was found worthy to open and to read the book, neither to look thereon. And one of the elders saith unto me, Weep not: behold, the Lion of the tribe of Juda, the Root of David, hath prevailed to open the book, and to loose the seven seals thereof. And I beheld, and, lo, in the midst of the throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth. And he came and took the book out of the right hand of him that sat upon the throne.”
– Revelation 5:1-7
To recap, the Father, the Son and the Holy Spirit are simultaneously three and one, not three or one.
One thing to keep in mind as the day of the LORD approaches is that, as the Creator, Jesus Christ can speak things into existence, and for that matter, out of existence. His sword proceeds from his mouth. i.e. And God said, and it was so.
“And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war. His eyes were as a flame of fire, and on his head were many crowns; and he had a name written, that no man knew, but he himself. And he was clothed with a vesture dipped in blood: and his name is called The Word of God. And the armies which were in heaven followed him upon white horses, clothed in fine linen, white and clean. And out of his mouth goeth a sharp sword, that with it he should smite the nations: and he shall rule them with a rod of iron: and he treadeth the winepress of the fierceness and wrath of Almighty God. And he hath on his vesture and on his thigh a name written, KING OF KINGS, AND LORD OF LORDS.”
– Revelation 19:12-16