In John 14:27, Jesus promised His disciples peace. The Bible presents several ways that believers have peace through faith in Christ. Jesus' death and resurrection made peace between us and God possible (John 17:20–21; Romans 5:8–10; 2 Corinthians 5:21). He also assured His disciples that He would send a Helper to make this possible (John 14:15–16). This Helper, given to us at salvation (Ephesians 1:13–14), gives us peace, or an unwavering trust unchanged by circumstance (Romans 8:6; Galatians 5:22–23; Philippians 4:6–7). The Spirit reassures us that we belong to God (Romans 8:14–17; 1 John 3:24). So, peace with God gives us a consistent source of comfort and peace through the difficult trials we face in life (John 16:33). Faith in Christ also leads to peace with others. All who put their faith in Jesus become God's children (John 1:12) and are part of His family, functioning as a unified body (1 Corinthians 12:12–27; Ephesians 2:11–22; 4:1–6). This gift of peace includes our attitude toward nonbelievers, too (Romans 12:18). The Bible establishes that Jesus gives us peace with God, peace within, and peace with others when we put our faith in Him.
The world longs for peace but never achieves it. During any given year, some nation somewhere is embroiled in war. Individually, people seek peace through weeklong retreats, yoga classes, or the latest self-help book. But only Jesus Christ provides true, lasting peace. Because of Christ, we can bring our troubles to God in prayer and be assured that He works all things for our good (Philippians 4:6–7; Romans 8:28). We also have the peace of eternal security through the blood of Christ, through whom we have the forgiveness of sins (John 3:16–18; 1 John 1:9; Jude 1:24–25). This is why Christians, even under persecution, have been able to endure. From Paul to early Church martyrs like Polycarp of Smyrna to faithful twentieth century Christians like Corrie ten Boom, the Holy Spirit has made it possible to endure torment and still maintain the peace that Paul said surpasses all understanding (Philippians 4:7). Today, Christianity is still under attack in many parts of the world, but believers have assurance through Jesus that we can maintain inner peace through the Spirit’s strength (Philippians 4:13; Galatians 5:22–23). We also know we are adopted sons and daughters with an ensured and eternal inheritance (Ephesians 1:3–14; 1 Peter 1:3–9). Jesus gives us peace with God, peace within, and peace with others when we put our faith in Him.