We have a picture in Daniel Chpt. 3 of the Church (main harvest) going through the fire (tribulation period) when the 3 hebrews are thrown into the fiery furness for not bowing down to the 666 cubits high image the king had made. There was another person in the fire with the 3 hebrews "likend unto the son of God" (Read Daniel 3:24-25) The manchild in Rev 12:5 are those in Rev 3:10. the 1st fruits will be accounted worthy to escape the hour of trial that comes on all the world to try those on the earth because they pleased God.