Ardhanarishvara symbolizes that the male and female principles are inseparable. The composite form conveys the unity of opposites ("coniunctio oppositorum") in the universe. The male half of Ardhanarishvara stands for Purusha and female half is Prakriti. Purusha is the male principle and passive force of the universe, while Prakriti is the female active force; both are "constantly drawn to embrace and fuse with each other, though... separated by the intervening axis". The union of Purusha (Shiva) and Prikriti (Shiva's energy, Shakti) generates the universe, an idea also manifested in the union of the Linga of Shiva and Yoni of Devi creating the cosmos. The Mahabharata lauds this form as the source of creation. Ardhanarishvara also suggests the element of Kama or Lust, which leads to creation.