Rev 12:1,2 "Then a great sign was seen in heaven: A woman was arrayed with the sun, and the moon was beneath her feet, and on her head was a crown of 12 stars, and she was pregnant. And she was crying out in her pains and in her agony to give birth." It appears what we start with here in Rev 12 verses 1-2 is the beginning of the sacred secret. That plan in the garden of Eden that set out the completion of Jehovah's redemption of mankind, and the establishment of his kingdom. Gen 3:15 "And I will put enmity between you and the woman and between your offspring and her offspring." The women being that of the spiritual bride of Christ represented by the 12 stars, 12 tribes of Israel, or their fulfillment in that of Christs brothers of 144k. The sun and moon represent the light that shines over mankind to light their way... Gen 1:16 "And God went on to make the two great luminaries, the greater luminary for dominating the day and the lesser luminary for dominating the night, and also the stars." The women is seen as pregnant because from the very beginning Jehovah had set forth the completion of these events before they occurred. 1Cor 2:7 "But we speak God’s wisdom in a sacred secret, the hidden wisdom, which God foreordained before the systems of things for our glory." Rev 10:7 "But in the days when the seventh angel is about to blow his trumpet, the sacred secret that God declared as good news to his own slaves the prophets is indeed brought to a finish.” Revelation chapter 12 begins all the way back from the very beginning of this system of things in that very first prophecy.