While Revelation has many similarities with other ancient apocalyptic books, the letters of Revelation 2 and 3 are somewhat out of character in such a work. Some scholars suggest that they are "prophetic letters," a type of writing that appears in the Old Testament (2 Chron. 21:12-15; Jer. 29) and early Jewish literature (2 Baruch 77:17-19; Epistle of Jeremiah 1). Such letters carried a great deal of authority, and people treated them as if they were royal or imperial edicts.
The Roman world had no official postal system, except for governmental business. Friends who happened to be traveling in the right direction, or designated messengers, carried most letters. But the empire's superb road system, combined with efficient shipping on the Mediterranean Sea, made travel easier and faster than it had ever been before. Archaeologists have found evidence of people in Egypt sending letters to Asia Minor and receiving replies in as short a time as 25 days. That isn't all that much different than today!
Letters almost always introduce an element of suspense. The envelope gives some idea as to sender and purpose, but the content may still be a surprise. I have often received letters that look like official business, including a see-through panel. Opening them, I expect a bank statement or official correspondence, only to find another credit card offer or an enticement to enroll in a book club. I have learned to look at the postage stamp or mark on such correspondence. If the sender paid full rate, the contents will probably be important to me. But if the letter went by bulk mail, the contents will most likely be a waste of my time.
Once I received a brown envelope from the Internal Revenue Service, the tax collection office of the United States. Such letters might as well have black borders, as they usually portend great financial loss to the receiver! Since I was in school at the time and funds were limited, I opened the letter with a heavy heart. But to my joyous surprise I found a check inside! Someone had decided to audit my last tax return and discovered a mistake that I had made to my disadvantage. Obviously, one has to open a letter to be certain of its contents.
I can imagine the suspense in the cities of Asia Minor as the readers of the Apocalypse came to the part that said, "To the angel of the church of Ephesus, write," or "To the angel of the church of Smyrna, write." The members of these respective churches must have held their breath as they awaited a message directly from Jesus. And the collection of letters contained a lot of surprises!
Lord, I eagerly await instructions through Your Spirit today. Be straight with me. I am willing to accept and carry out Your message to me.