The central idea of Hinduism is "Brahman", not to be confused with the god Brahma (creator). "Brahman" is the True reality of all things. It is formless, incorporeal, genderless, indescribable, unchanging, can only be experienced. Everything that exists, and we as individuals, are part of Brahman. Our sense of individuality, at the level of the Absolute in Brahman, can be considered illusory.The sense of separability between us and the world and all other beings constitutes the essence of "Maya" which comprises also the ideas about our ego and identity, the objects of all our thoughts are "Maya". Our inner reality, the Witness, the Self itself, is defined as the "Atman", which is not separate from the Absolute in Brahman, but they are undifferentiated, one and the same Spirit, one and the same substratum of Existence and Pure Consciousness.Hindus believe that after physical death, the essence of the individual reincarnates in a new body and returns to the world, giving rise to the theory of reincarnation or transmigration of the soul. The endless cycle of birth, death and rebirth forms the "Samsara".