Gnosticism
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1 Timothy 6:20, 21
O Timothy, guard what has been entrusted to you. Avoid irreverent, empty chatter and the opposing arguments of so-called “knowledge,” / which some have professed and thus swerved away from the faith. Grace be with you all.
Colossians 2:8
See to it that no one takes you captive through philosophy and empty deception, which are based on human tradition and the spiritual forces of the world rather than on Christ.
1 John 4:2
By this you will know the Spirit of God: Every spirit that confesses that Jesus Christ has come in the flesh is from God,
2 Timothy 3:16
All Scripture is God-breathed and is useful for instruction, for conviction, for correction, and for training in righteousness,
1 John 4:3
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 which is already in the world at this time.
1 John 2:22
Who is the liar, if it is not the one who denies that Jesus is the Christ? This is the antichrist, who denies the Father and the Son.