Are you sure that the Bible says what you think it says?
Are you sure it means what you think it means?
Are you sure you’re not adding something that’s not actually there?
Are you sure you’re not relying on someone’s interpretation of scripture instead of what scripture actually says?
Are you sure that your beliefs are actually consistent with scripture?
Are you sure your desire for truth is strong enough to make certain that you can answer YES to all of the above?