“But even if we, or an angel from heaven, preach any other gospel to you than what we have preached to you, let him be accursed. As we have said before, so now I say again, if anyone preaches any other gospel to you than what you have received, let him be accursed.” (Galatians 1:8-9)
Remember what the Berean’s did to test the truth:
“…they received the word with great eagerness, examining the Scriptures daily to see whether these things were so” (Acts 17:11)