1 Corinthians 11:19
For there must be heresies among you, that they who are the tried ones, may be made manifest among you.
Matthew 24:24
for false Messiahs and false prophets shall arise, and give out great signs and wonders; so as to deceive, if it were possible, even the elect.
Acts 17:11
Now these were more liberally minded men than those of Thessalonica, for they received the word with all readiness of mind, daily, examining the Scriptures if these things were really so.
2 Corinthians 8:8
I speak not by commandment, but because of the forwardness of others, and to prove the genuineness of your love.
Ephesians 4:14
that we should be no longer infants, floating on the waves, and carried about with every wind of novel doctrine, by the juggling of men, by their craftiness after the delusive wiles of error;
2 Thessalonians 2:11
And for this cause God shall send unto them the energy of delusion, that they should believe a lie:
1 John 2:19
They went out from us, but they were not of us; for if they had been of us, they would have continued with us; but they departed, that they might be made manifest that they are not all of us:
1 John 4:1
BELOVED, believe not every pretender to inspiration, but bring these spirits to the trial whether they are of God; because many false prophets are gone forth into the world.
1 John 4:4
Ye are of God, my dear children, and have overcome them; because he that is in you is greater than he that is in the world.
Revelation 13:14
and deceiveth the inhabitants of the earth by the signs, which he is enabled to perform before the beast, saying to the dwellers upon the earth, that they should make an image for the beast who had the stroke of the sword, and survived.