Elias is come already
17:12 Elias is come already. John the Baptist had come “in the spirit and power of Elijah” (Luke 1:17), as the forerunner of Christ at His first coming, and he had been slain. Elijah will actually return as prophesied, as the forerunner of Christ at His second coming, and he also will finally be slain (see notes on Revelation 11:3-12). Thus, John was a type of Elijah.