Just as Roman soldiers relied on the caliga (hobnailed sandal) for stability, protection, and endurance, Christians are to wear the "shoes of the gospel of peace" (Eph 6:15). This peace is not just the absence of conflict, but the shalom (wholeness) that comes from being justified by faith (Rom 5:1). This peace with God is our spiritual "hobnail," giving us a firm foundation to stand in chaos and the readiness to carry the good news of salvation (Is 52:7).