7 After much debate had taken place, Peter got up and said to them, “My brothers, you are well aware that from early days God made his choice among you that through my mouth the Gentiles would hear the word of the gospel and believe.”
24 “Yet I consider life of no importance to me, if only I may finish my course and the ministry that I received from the Lord Jesus, to bear witness to the gospel of God’s grace.”
16 For I am not ashamed of the gospel. It is the power of God for the salvation of everyone who believes: for Jew first, and then Greek.
17 For in it is revealed the righteousness of God from faith to faith; as it is written, “The one who is righteous by faith will live.”
3 Moreover, not even Titus, who was with me, although he was a Greek, was compelled to be circumcised,
4 but because of the false brothers secretly brought in, who slipped in to spy on our freedom that we have in Christ Jesus, that they might enslave us -
5 to them we did not submit even for a moment, so that the truth of the gospel might remain intact for you.
15 “Beware of false prophets, who come to you in sheep’s clothing, but underneath are ravenous wolves.
16 By their fruits you will know them. Do people pick grapes from thornbushes, or figs from thistles?
17 Just so, every good tree bears good fruit, and a rotten tree bears bad fruit.
18 A good tree cannot bear bad fruit, nor can a rotten tree bear good fruit.
19 Every tree that does not bear good fruit will be cut down and thrown into the fire.
20 So by their fruits you will know them.”
22 False messiahs and false prophets will arise and will perform signs and wonders in order to mislead, if that were possible, the elect.
23 Be watchful! I have told it all to you beforehand.
2 Peter 2
1 There were also false prophets among the people, just as there will be false teachers among you, who will introduce destructive heresies and even deny the Master who ransomed them, bringing swift destruction on themselves.
2 Many will follow their licentious ways, and because of them the way of truth will be reviled.
3 In their greed they will exploit you with fabrications, but from of old their condemnation has not been idle and their destructiondoes not sleep.
1 John 4
1 Beloved, do not trust every spirit but test the spirits to see whether they belong to God, because many false prophets have gone out into the world.
2 This is how you can know the Spirit of God: every spirit that acknowledges Jesus Christ come in the flesh be longs to God,
3 and every spirit that does not acknowledge Jesus does not belong to God. This is the spirit of the antichrist that, as you heard, is to come, but in fact is already in the world.
2 Corinthians 11
12 And what I do I will continue to do, in order to end this pretext of those who seek a pretext for being regarded as we are in the mission of which they boast.
13 For such people are false apostles, deceitful workers, who masquerade as apostles of Christ.
14 And no wonder, for even Satan masquerades as an angel of light.
6 I am amazed that you are so quickly forsaking the one who called you by (the) grace (of Christ) for a different gospel
7 (not that there is another). But there are some who are disturbing you and wish to pervert the gospel of Christ.
8 But even if we or an angel from heaven should preach (to you) a gospel other than the one that we preached to you, let that one be accursed!
9 As we have said before, and now I say again, if anyone preaches to you a gospel other than the one that you received, let that one be accursed!