Roman ships traveled some 900 sea routes that linked hundreds of ports. Christians could therefore travel throughout the Roman world.
وَهٰكَذَا ،‏ تَمَكَّنَ خُدَّامُ ٱللهِ مِنَ ٱلتَّوَاصُلِ مَعَ شَتَّى ٱلنَّاسِ ،‏ مَا سَاهَمَ فِي نَشْرِ رِسَالَةِ ٱلْمَلَكُوتِ .‏