THEY ARE ON THE PROWL:

“Beware of false prophets who come to you disguised as sheep but underneath are ravenous wolves. You will be able to tell them by their fruits. Can people pick grapes from thorns, or figs from thistles? In the same way, a sound tree produces good fruit but a rotten tree bad fruit. A sound tree cannot bear bad fruit, nor a rotten tree bear good fruit. Any tree that does not produce good fruit is cut down and thrown on the fire. I repeat, you will be able to tell them by their fruits” {Mtt.7:15-20}

They claim equality with priests; the oracle of God with their understanding of the scriptures just like the days of Our Lord Jesus and St.Paul thus

“You pore over the scriptures, believing that in them you can find eternal life; it is these scriptures that testify to me” [Jn.5:39]

‘I will go on acting as I do at present, to cut the ground from under the feet of those who are looking for a chance to be proved my equals in grounds for boasting. These people are counterfeit apostles, dishonest workers disguising themselves as apostles of Christ. There is nothing astonishing in this; even satan disguises himself as an angel of light. It is nothing extraordinary, then, when his servants disguise themselves as the servants of uprightness. They will come to the end appropriate to what they have done’ (2 Cor.11:12-15)

“People like this are dried-up springs, fogs swirling in the wind and the gloom of darkness is stored up for them. With their high-sounding but empty talk they tempt back people who have scarcely escaped from those who live in error, by playing on the disordered desires of their human nature and by debaucheries. They may promise freedom but are themselves slaves to corruption; because if anyone lets himself be dominated by anything, then he is a slave to it; and anyone who has escaped the pollution of the world by coming to know our Lord and Savior Jesus Christ and who then allows himself to be entangled and mastered by it a second, ends up by being worse than he was before. It would have been better for them never to have learnt the way of uprightness than to learn it and then desert the holy commandment that was entrusted to them. What they have done is exactly as the proverb rightly says: the dog goes back to its vomit and as soon as the sow has been washed, it wallows in the mud” {2 Pet.2:17-22}

Watch out; they are usually more “friendly” than any friend or relation you may have encountered in life thus “keep sober and alert because your enemy the devil is on the prowl like a roaring lion looking for someone to devour. Stand up to him, strong in faith and in the knowledge that it is the same kind of suffering that the community of your brothers throughout the world is undergoing” (1 Pet.5:8-9).