Based on a sketch completed after a shamanic guided meditation at Alex Grey’s workshop. My sense was of the womb being a chalice of light, containing eternity and of it being the Cosmic Universe itself. Also a sense of when the inner sword (inner masculine) is embodied then this will lead to a holy uniting of the masculine and feminine within, and the illumination of the Holy Spirit. The egg represents the potential of the soul. Another interpretation might be that it conveys the birth of the golden self from inside oneself or from the sacred blood of the feminine.