1 Jn 5:20 still stands as True, its a Apostolic Testimony that Jesus the Son is being recognized as the True God and Eternall Life. 1 Jn 5:
20And we know that the Son of God is come, and hath given us an understanding, that we may know him that is true, and we are in him that is true,
even in his Son Jesus Christ. This is the true God, and eternal life.
John uses the conjunction kai which means :
- and, also, even, indeed, but
He is stating that Jesus Christ is the True God , also Eternal Eternal Life.
Now He had Just stated earlier in the epistle that Jesus Christ was that
Eternal Life with the Father, notice 1 Jn 1:
2(For the life was manifested, and we have seen it, and bear witness, and shew unto you that
eternal life, which was with the Father, and was manifested unto us )
Now He merely combines the Two at the end of His Epistle, designating Him both the True God and Eternal Life.
Its basically the same thing He did in His epistle in John 1:1-2
1In the beginning was the Word, and the Word was with God,
and the Word was God.
2The same was in the beginning
with God.
Either we accept the plain teaching of scripture or we do not.