It is a system of Hindu philosophy that forms the basis of modern schools of Hinduism. The foundation of this system is the principle of Brahman - Essence of all reality i.e. absolute. It also stresses on the fact that the aim of human life is to transcend the limitations of self identity and realize one's unity with Brahman. The three pillars of this school of thought are the Upanishads, Bhagavadgita and the Brahma sutras.
Several sub-schools of Vedanta have evolved based on their concept of the relationship between the self (atman) and the absolute (Brahman). Some of the sub-schools are Advaita, Vishisthadvaita, Dvaita, Dvaitadvaita, Shuddhadvaita, Achintya Bhedabheda and Purnadvaita. The term "modern Vedanta" is sometimes used to describe the interpretation of Advaita Vedanta given by Swami Vivekananda.