https://www.biblestudytools.com/encyclopedias/isbe/gnosticism.html
https://www.bibletools.org/index.cfm/fuseaction/topical.show/RTD/cgg/ID/66/Gnosticism.htm scroll down to I John
1 John 2:22 ESV / 20 helpful votes
Who is the liar but he who denies that Jesus is the Christ? This is the antichrist, he who denies the Father and the Son.
1 John 4:2-3 ESV / 19 helpful votes
By this you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God, and every spirit that does not confess Jesus is not from God. This is the spirit of the antichrist, which you heard was coming and now is in the world already.
John 14:6 ESV / 19 helpful votes
Jesus said to him, “I am the way, and the truth, and the life. No one comes to the Father except through me.
1 John 2:1-29 ESV / 16 helpful votes Helpful Not Helpful
My little children, I am writing these things to you so that you may not sin. But if anyone does sin, we have an advocate with the Father, Jesus Christ the righteous. He is the propitiation for our sins, and not for ours only but also for the sins of the whole world. And by this we know that we have come to know him, if we keep his commandments. Whoever says “I know him” but does not keep his commandments is a liar, and the truth is not in him, but whoever keeps his word, in him truly the love of God is perfected. By this we may know that we are in him: ...