"In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him: and without him was made nothing that was made. In him was life, and the life was the light of men. And the light shineth in darkness, and the darkness did not comprehend it....And the Word was made flesh, and dwelt among us, (and we saw his glory, the glory as it were of the only begotten of the Father,) full of grace and truth" (John 1:1-5, 14).
If Pride is the first sin, then Gnosticism was the first rebellion. We have little record of that fateful spiritual battle waged in the heavens in the dawn before time; we know nothing more than what has been revealed, and that is itself scarce. We know that one of the greatest amongst the angels--Lucifer, the bearer of light--was a proud creature who rebelled against his Creator. We know that the immediate result of this rebellion is that he and the other traitorous angels were cast out of heaven, out of the presence of God. Lucifer could not rule heaven, but would be made instead to govern hell.