Do not judge by appearances

                          Do not judge by appearances, but judge with right judgment."   John 7:24

Beloved, do not believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone out into the world.   1John 4:1
"Beware of false prophets, who come to you in sheep's clothing but inwardly are ravenous wolves.   Matthew 7:15
                                                                                                                            
And many false prophets will arise and lead many astray.  Matthew 24:11

Then if anyone says to you, 'Look, here is the Christ!' or 'There he is!' do not believe it. For false christs and false prophets will arise and perform great signs and wonders, so as to lead astray, if possible, even the elect.    Matthew 24:23-24