1 Corinthians 11:19
For there must be even heresies among you, that they who are approved may be made manifest among you.
Matthew 24:24
for there shall rise up false Christs, and false prophets, who shall shew great signs and prodigies, so as to deceive, if possible, even the elect.
Acts 17:11
These were more ingenuous than those at Thessalonica; for they received the word with all readiness of mind, searching the scriptures daily, whether these things were so.
2 Corinthians 8:8
I speak not by way of command, but to prove the sincerity of your love also, by means of the forwardness of others.
Ephesians 4:14
That we may be no longer children fluctuating and carried about with every wind of doctrine, by the artful insinuations of men, and their crafty methods of deceiving;
2 Thessalonians 2:11
And for this cause God will send upon them the efficacy of error, so that they shall themselves believe the lie:
1 John 2:19
They went out from us, but they were not of us: for if they had been indeed of us, they would have continued with us; but this was done that they might be made manifest, because all, that are with us, are not indeed of us.
1 John 4:1
Beloved, believe not every Spirit, but try the spirits, whether they be of God: for many false prophets are gone out into the world.
1 John 4:4
Ye are of God, little children, and have overcome them; because greater is He, that is in you, than he that is in the world.
Revelation 13:14
by the signs which it was given him to do in the presence of the beast, telling the inhabitants of the earth to make an image to the beast, that had received the wound of the sword, and yet lived.