I John 2
21 I have not written to you because you do not know the truth, but because you do know it, and [
f]because no lie is of the truth. 22 Who is the liar except the one who denies that Jesus is the [
g]Christ? This is the antichrist, the one who denies the Father and the Son. 23 Whoever denies the Son does not have the Father; the one who confesses the Son has the Father also. 24
As for you,
see that what you heard from the beginning remains in you. If what you heard from the beginning remains in you, you also will remain in the Son and in the Father.
John 1
1 In the beginning was the Word, and the Word was with God and the Word was God. 2 [
a]He was in the beginning with God. 3 All things came into being through Him, and apart from Him [
b]not even one thing came into being that has come into being. 4 In Him was life, and the life was the Light of mankind. 5 And the Light shines in the darkness, and the darkness did not [
c]grasp it.
6 A man [
d]came,
one sent from God,
and his name was John. 7 [
e]He came [
f]as a witness, to testify about the Light, so that all might believe through him. 8 [
g]He was not the Light, but
he came to testify about the Light.
9 [
h]
This was the true Light [
i]that, coming into the world, enlightens every person. 10 He was in the world, and the world came into being through Him, and
yet the world did not [
j]know Him. 11 He came to His [
k]own, and His own people did not [
l]accept Him. 12 But [
m]as many as received Him, to them He gave the right to become children of God, to those who [
n]believe in His name, 13 who were [
o]born, not of [
p]blood, nor of the will of the flesh, nor of the will of a man, but of God.
14 And the Word became flesh, and dwelt among us; and we saw His glory, glory as of the only
Son from the Father, full of grace and truth. 15 John *testified about Him and called out, saying, “This was He of whom I said, ‘He who is coming after me has proved to be [
q]my superior, because He existed before me.’”
Who is light? God. God is light. God is life. What is Jesus? According to this, He is God. He was in the beginning with God. Nothing came into being apart from Jesus. The Father and the Spirit both testified of the Son. John also testified of the Son, of th elight, the true Light. Israel was God's own people, but here it says that Jesus came to His own people who did not accept Him. Again, Jesus was/is God. However, He is God incarnate, God in the flesh. God taken upon Himself human form, dwelling in His creation as one of His creation. Flesh and Spirit, human and divine natures in one body, in full communion. The sacrifice, and the High Priest who sanctifies the sacrifice.
I John 4
"Beloved, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world. 2 By this you know the Spirit of God: every spirit that confesses that Jesus Christ has
come in the flesh is from God; 3 and every spirit that does not confess Jesus is not from God; this is the
spirit of the antichrist, which you have heard is coming, and now it is already in the world."
Why is this important in I John? Gnosticism was being born. The belief that Jesus did not come in the flesh because the flesh is evil. The belief that Jesus didn't actually come to Earth at all, but only in a spiritual way, much less died on the cross. Another belief is that Jesus was solely human, and the divine came upon Him at baptism and left before His crucifixion.
Last but not least those verses that command we be baptized in the name of the Father, the Son and the Holy Spirit. There are other passages (quite a few), however, you will notice that the word trinity did not show up once.