The stance serves recoil control
Where the grip controls the gun in your hands, the stance puts your whole body behind it so recoil drives into a stable, forward-leaning platform and the pistol returns to target on its own. A pistol fired from a passive, upright, or backward-leaning posture flips up and recovers slowly; the same pistol fired from an aggressive athletic stance recoils flat and snaps back, ready for the next shot. Stance is recoil management with your body.
The athletic stance
The modern default is an athletic, slightly aggressive stance (a forward-weighted isosceles): feet about shoulder-width with the support-side foot slightly forward, knees softly bent, weight forward on the balls of the feet, hips and shoulders squared to the target, and a distinct forward lean from the waist — "nose over toes." Your arms extend the pistol toward the target, firm but not locked rigid (a slight bend absorbs recoil better than rigidly locked elbows). The shoulders roll slightly forward and down. This is the same athletic platform taught for the carbine, and for the same reason: it puts your mass behind the gun and keeps you balanced and mobile.
The recoil path
When the pistol fires, recoil travels back through your extended arms into your shoulders and down into your forward-leaning body and braced legs. Built correctly, that path is straight and the gun returns to where it started. Built poorly — arms passive, weight back — recoil flips the muzzle up and rocks you backward, and you have to re-find the target every shot. The aggressive forward posture and a slight bend in the elbows let your body and arms soak up recoil and drive the sights back down onto the target. Combined with the support-hand-dominant grip from the last lesson, a good stance is what makes fast, accurate follow-up shots possible.
The classic mistake: leaning back
The instinctive beginner error is to lean *away* from the gun — shoulders back, weight on the heels, trying to get away from the recoil and noise. This is exactly backward and it surrenders recoil control: a rearward-leaning shooter's muzzle flips dramatically, recovery is slow, and they're off-balance. Train the opposite from the start — get aggressive, weight forward, into the gun. If you find yourself rocking back under recoil, exaggerate the forward lean until your body stays planted and the sights track straight up and down. Think of an athlete ready to drive forward, not someone flinching away — that posture is what controls the pistol.