The Bible encourages everyone NOT to believe everything they hear, but to get the facts first, and then make an informed decision as to what to believe:
All Scriptures are from the New World Translation:
1st John 4:1: Beloved ones, do not believe every inspired expression, but test the inspired expressions to see whether they originate with God, because many false prophets have gone forth into the world.
Acts 17:10-12: Immediately by night the brothers sent both Paul and Silas out to Be·roe´a, and these, upon arriving, went into the synagogue of the Jews. Now the latter were more noble-minded than those in Thes·sa·lo·ni´ca, for they received the word with the greatest eagerness of mind, carefully examining the Scriptures daily as to whether these things were so. Therefore many of them became believers, and so did not a few of the reputable Greek women and of the men.
Galatians 1:8-9: However, even if we or an angel out of heaven were to declare to YOU as good news something beyond what we declared to YOU as good news, let him be accursed. As we have said above, I also now say again, Whoever it is that is declaring to YOU as good news something beyond what YOU accepted, let him be accursed.
1st Thessalonians 5:21: Make sure of all things; hold fast to what is fine.
Proverbs 14:15: Anyone inexperienced puts faith in every word, but the shrewd one considers his steps.
Matthew 7:15-19: ?Be on the watch for the false prophets that come to YOU in sheep?s covering, but inside they are ravenous wolves. By their fruits YOU will recognize them. Never do people gather grapes from thorns or figs from thistles, do they? Likewise every good tree produces fine fruit, but every rotten tree produces worthless fruit; a good tree cannot bear worthless fruit, neither can a rotten tree produce fine fruit. Every tree not producing fine fruit gets cut down and thrown into the fire. Really, then, by their fruits YOU will recognize those [men].
Matthew 24:4-5: And in answer Jesus said to them: ?Look out that nobody misleads YOU ; for many will come on the basis of my name, saying, ?I am the Christ,? and will mislead many.
Revelation 2:2: ?I know your deeds, and your labor and endurance, and that you cannot bear bad men, and that you put those to the test who say they are apostles, but they are not, and you found them liars.