Hindus believe that all living creatures have a soul. This soul - the spirit or true self of every person, is called the ātman. The soul is believed to be eternal. According to the monistic/pantheistic (non-dualist) theologies of Hinduism (such as Advaita Vedanta school), this Atman is indistinct from Brahman, the supreme spirit. The goal of life, according to the Advaita school, is to realise that one's soul is identical to supreme soul, that the supreme soul is present in everything and everyone, all life is interconnected and there is oneness in all life. Dualistic schools (see Dvaita and Bhakti) understand Brahman as a Supreme Being separate from individual souls. They worship the Supreme Being variously as Vishnu, Brahma, Shiva, or Shakti, depending upon the sect. God is called Ishvara, Bhagavan, Parameshwara, Deva or Devi, and these terms have different meanings in different schools of Hinduism.