When one considers the thousands of preachers and priests in the world, it is obvious that most of them are not speaking for God because they teach conflicting things.
One man I baptized started reading the Bible because different priests in his own church were teaching contradictory things.
His reaction was: “Since the priests say different things, I will read the Bible for myself. What it says will certainly be right.” The first time I met him he said: “I don’t know where it will lead me, but I have decided to do what the Bible says.” I thought, “If he really means that, he will become a Christian.” And he did. Have we decided to do what the Bible says?
God’s word enables us to distinguish truth from error.