Galatians 1:8-9

But even if we, or an angel from heaven, should preach to you a gospel contrary to what we have preached to you, he is to be accursed! As we have said before, so I say again now, if any man is preaching to you a gospel contrary to what you received, he is to be accursed! (Galatians 1:8-9) 

My Pastor has mentioned this verse in the past during service and it immediately reminded me of many of the false religions in the world.  Several of these false religion's so called prophets claim to have received their message from an angel who appeared to them and gave them a gospel...one different from the gospel of the Bible. 

It is claimed that Muhammad, the founder of Islam, had the Qur'an dictated to him by the angel Gabriel.  Joseph Smith, the founder of Mormonism, claimed he was visited by an angel named Moroni who gave him golden tablets with the true revelation of God which Joseph could translate.  Many other cult leaders and even some in the charismatic church claim to have visitations from angelic beings with a new word from God.  We have no excuse falling for this stuff, Paul warned us nearly 2,000 years ago not to be taken in by a different gospel, even if it is from an angel. 

In 2 John 10-11 we are told that If anyone comes to you and does not bring this teaching, do not receive him into your house, and do not give him a greeting; for the one who gives him a greeting participates in his evil deeds.  John says that if we take these false teachers into our homes or greet them (showing that we associate with them and put them up for the night, helping them out) we are participates in their evil deeds.  As Christians we need to have a solid understanding of Biblical truth so when false teachings come along we know the difference between the truth and a lie.  The only way to recognize a lie is by knowing the truth and the only way to know the truth is to study the scriptures.  This is why I recommend reading the Bible everyday and listening to solid preachers and teachers so that we may know what the truth and not be fooled by false teachings.