Treasury of Scripture Knowledge

Summary

For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.

Bible References

Many

2 Peter 2:1
But just as there were false prophets among the people before, there will also be false teachers among you [Christians]. They will privately teach harmful doctrines that destroy people [spiritually], by even denying [that Jesus is] the Master, [and thereby] destroying themselves quickly.
1 John 2:18
Dear children, it is [now] the last hour [i.e., the final period of God's dealing with people on earth], and since you have heard that an antichrist [i.e., a person who is against Christ] is coming, even now [you should be aware that] many antichrists have [already] come. This is [one way] we know that this is the last hour.
1 John 4:1
Loved ones, do not believe [the message of] every spirit [i.e., every person claiming to be a teacher], but test the spirits [i.e., require proof that they and their message are genuine] to see whether they represent God [or not], because many false prophets have begun circulating throughout the world.

Who

John 1:14
[Eventually] this Word became a human being and lived among us [Note: The word "lived" here refers to pitching a temporary tent]. (And we saw His splendor; such splendor as belongs to the Father's only Son), full of God's favor and truth.
1 Timothy 3:16
And without question the revealed secret of godly living is great. [It is this]: He [i.e., Christ, or God], who appeared in a fleshly body [was] vindicated [of false charges] by the Holy Spirit; [He was] seen by angels, was preached among the nations, was believed in throughout the world [and finally] was taken up into glory [i.e., heaven].
1 John 4:2
Here is how to know [who is speaking from] the Holy Spirit of God: Every spirit [i.e., person] who proclaims that Jesus Christ has come [to earth] in a physical body is [speaking] from God. [See I Cor. 12:3].
Revelation 12:9
Then the great dragon was thrown out [of heaven]; he is the snake from ancient times who is [also] called "the Devil," and "Satan," the deceiver of the entire world. He was thrown down to earth along with his angels.
Revelation 13:14
[And] by being given [power] to perform these signs in the sight of the [first] beast, he deceived the people on earth. He told them to make a statue to [honor] the [first] beast, who had been wounded by a sword and yet lived [through it].

This is

1 John 2:22
Who is the liar? It is the person who denies that Jesus [truly] is the Christ [i.e., God's specially chosen One]. This person is the antichrist [See verse 18]; he is the one who denies [the truth about] the Father and the Son.
1 John 4:3
But every spirit who does not proclaim [this truth about] Jesus is not [speaking] from God. And this [person] represents the spirit of the antichrist [See 2:18-22; II John 7], whom you have heard would come. Well, now he is already here!