Jesus' final command was to 'go and make disciples of all nations' (Matthew 28:19). He told His disciples, 'You will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth' (Acts 1:8). The Book of Acts chronicles this expansion — from Jerusalem to Judea to Samaria to the Gentile world, culminating in Paul reaching Rome itself.
Paul's missionary journeys covered thousands of miles. His first journey took him through Cyprus and Galatia (Acts 13-14). His second journey brought him into Macedonia and Greece — Philippi, Thessalonica, Berea, Athens, Corinth (Acts 15-18). His third journey revisited many of these cities and spent over two years in Ephesus (Acts 18-21). Finally, as a prisoner, Paul was transported to Rome, where he preached 'with all boldness and without hindrance' (Acts 28:31).
Paul's letters — Romans, Corinthians, Galatians, Ephesians, Philippians, Colossians, Thessalonians — were addressed to churches planted along these very routes. The gospel traveled not by divine teleportation but by ordinary people walking ordinary roads.
