It is fashionable in some academic circles to exercise scholarly criticism of the Bible. In so doing, scholars place themselves above the Bible and seek to correct it. If indeed the Bible is the Word of God, nothing could be more arrogant. It is God who corrects us; we don’t correct Him. We do not stand over God but under Him.
I would say much of religious heresy results from a misunderstanding of God’s basic nature. Once we have a proper understanding of God, then most of our lives usually coincide with who God is and what He desires for each one of us.
A man may preach from false motives. A man may write books, and make fine speeches, and seem diligent in good works, and yet be a Judas Iscariot. But a man seldom goes into his closet, and pours out his soul before God in secret, unless he is serious.
Just as bank tellers need a thorough knowledge of legitimate currency in order to spot counterfeit bills, so Christians need a thorough knowledge of the Bible in order to spot bogus religious teachings. How grounded are you in the Scriptures? How deep are your theological roots? How capable are you of detecting false teachings?