Paul calls peace something that “rules,” an active governor, not a passive absence of conflict. We tend to think of peace as what's left once the noise goes away. Paul describes it as something with authority, meant to actually adjudicate between competing internal voices, not just quiet them. He extends that same peace into “whatever you do” too, not reserved for crisis moments or quiet devotional time, but governing ordinary action, word and deed alike. The ruling isn't occasional. It's meant to be constant enough to touch the smallest task.