A bit and a bridle.
A rider uses them to impose his will on the horse or the mule.
It forces the animal to obey.
A horse must yield or experience physical pain.
We have understanding, though.
We know who God is.
We know what He has done for us.
We willingly seek His will.
We gladly obey His commands.
We humbly yield to Him.
We don’t experience the pain of rebellion.