Bit

The bit is the mouth-piece of a bridle, used to control horses and mules. Two scripture passages use the harness as a moral image — one in the Psalms, comparing stubborn behavior to an animal that will only respond to forced restraint, and one in James, comparing the small bridle that turns the whole horse to the small tongue that steers the whole person.

Bit and Bridle as Image of Forced Restraint

The Psalm offers the picture as a warning addressed in the second person. The whole verse moves through the comparison: "Don't be⁺ as the horse, or as the mule, which have no understanding; Whose trappings must be bit and bridle to hold them in, [Or else] they will not come near to you" (Ps 32:9). The bit and bridle here are the gear of last resort — what is needed when an animal lacks the understanding to come willingly. The verse stands inside the larger frame of Yahweh's promise to "instruct you and teach you in the way which you will go" (Ps 32:8); the bit-and-bridle line names the alternative kind of guidance the unteachable will require.

The Bridle in the Mouth and the Tongue

James uses the same harness in a positive image — the small piece in the mouth controls the large body. "Now if we put the horses' bridles into their mouths that they may obey us, we turn about their whole body also" (Jas 3:3). The verse opens the section on the tongue (Jas 3:1-12) and supplies the controlling analogy: a small instrument placed in the mouth governs the whole creature. UPDV here uses "bridles" rather than the word "bit," but the apparatus described is the same mouth-piece that the Psalm calls the bit.