The Bible says “study to show thyself approved,” 2nd Timothy 2:15
As a Christian we must stay in the word, not just when we hear someone bring a message forward once a week for half an hour or so. Even there you need to take your Bible and prove out what’s been taught, does it line up with the word of God? That’s why we have the word of God, the Bible. Check things out, study it for yourself, know what you believe or have been taught, does it line up with the word of God?
Always go to the Bible. 2 Timothy 3:16, believe it, walk in it, it says, “all scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness.”