Jesus declares that none was greater than His cousin, John, known as 'the Baptist.' Jesus clearly says that John fulfilled the prophesied role of Elijah to come.
The church of the Philadelphians has a 'little strength', suggesting that Christ commends them for being 'faithful in little' and will reward them with much.
Prophets, even though they may bring new messages, stay consistent with existing Scripture and doctrine as they speak on behalf of God.
Although by no means a wild man, John the Baptist experienced alienation from people, especially the entrenched religious and political leaders.
John the Baptist fulfilled the prophecy of the 'Elijah to come.' We must apply duality of prophecy carefully and cautiously rather than indiscriminately.
We tend to organize things in groups of three, such as the proclamation of the three angels in Revelation 14:6-13. Angelos could refer to a human messenger.
God's truth may bring about sadness, astonishment, anger, and bitterness to the one delivering the message. James and John were types of the Two Witnesses.