In an argument I always have the perfect cutting line ready, and I always use it. How do I hold my tongue in the moment instead of firing back?

“The beginning of strife is as when one letteth out water: therefore leave off contention, before it be meddled with.”

The image is a water channel in a dry country. Once the earth wall is breached the water widens the gap on its own, and nobody is closing it by hand. Anyone farming in ancient Israel had watched it happen. The counsel is about timing rather than tolerance: there is a moment early in every argument when stopping is still cheap, and that moment goes past quickly.

“Behold, we put bits in the horses' mouths, that they may obey us; and we turn about their whole body. Behold also the ships, which though they be so great, and are driven of fierce winds, yet are they turned about with a very small helm, whithersoever the governor listeth.”

James reaches for two pieces of ordinary technology his readers knew well, the bit in a horse's mouth and the rudder on a grain ship. His point is proportion. A very small thing, placed under control, turns something large that is already moving at speed. He is not telling you that a sharp tongue makes you a bad person. He is telling you where the steering is.