Behold, we put bits in the horses” mouths ... - The meaning of this simple illustration is, that as we control a horse by the bit - though the bit is a small thing - so the body is controlled by the tongue. He who has a proper control over his tongue can govern his whole body, as he who holds a bridle governs and turns about the horse.
Related Commentaries of James 3:3
James 3:3
3 Behold, we put bits in the horses' mouths, that they may obey us; and we turn about their whole body.