The only Being is manifested throughout all planes of existence in two aspects, male and female, representing nature's positive and negative forces. In the plane of consciousness there are two aspects: Wahdat, consciousness, and Ahadiyat, eternal consciousness, and thus also spirit and matter, night and day, signify the dual aspect on lower planes. In the mineral and vegetable kingdoms sex is in a state of evolution, but the highest manifestation of male and female is man and woman.