1 Corinthians 11:19
For it is necessary that there should be heresies among you, that the approved may be manifest among you.
Matthew 24:24
For false Christs and false prophets shall be raised up, and shall show great signs and wonders, so as to deceive, if possible, even the elect.
Acts 17:11
but these were more noble than those in Thessalonica, for they received the word with all readiness, examining the Scriptures daily [to see] if these things were so.
2 Corinthians 8:8
I do not speak by command, but on account of the diligence of others, and to prove the genuineness of your love;
Ephesians 4:14
that we may be no longer children, driven about like waves and carried about with every wind of doctrine, by the art of men, and the craftiness of deceitful wiles,
2 Thessalonians 2:11
And therefore, God sends them a power 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 went out from us] that they might be manifest that they are not all of us.
1 John 4:1
BELOVED, believe not every spirit, but prove the spirits whether they are of God; for many false prophets have gone out into the world.
1 John 4:4
You 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
And he deceives those that dwell on the earth by the miracles which it was given him to perform before the beast, telling those that dwell on the earth to make an image of the beast which had the wound with the sword and lived.