"For I bear them witness that they have a zeal for God, but not according to knowledge. For they being ignorant of God's righteousness, and seeking to establish their own righteousness, have not submitted to the righteousness of God." (Rom. 10:2-3) "And in vain they worship Me, Teaching as doctrines the commandments of men." (Matt. 15:9)

The teacher of the Word of God is like the switchman who holds the key to the switches on the railroad. If he does his duty faithfully, the train will reach its destination safely. If he is not faithful to his charge, and sends a train down the wrong track, a terrible wreck can occur with the loss of many lives.

Likewise, a misplaced switch or wrong signal from the Word of God can send many into eternal damnation. "If anyone speaks, let him speak as the oracles of God." (1 Pet. 4:11)