Vishishtadvaita Vedanta is a philosophical school of thought within Hinduism, founded by Ramanuja in the 11th century. It is a non-dualistic system of Vedanta, which means it believes in the ultimate oneness of the individual soul (atman) and the universal soul (Brahman). However, unlike other schools of Vedanta, Vishishtadvaita also emphasizes the existence of individual souls and their relationship with Brahman.

According to Ramanuja, Brahman is not just an impersonal, abstract concept, but a personal deity with qualities and attributes. He believed that Brahman is the ultimate reality, the source of all existence, and the ultimate goal of all beings. At the same time, he also believed that the individual souls are distinct from Brahman and have their own unique qualities and identities.

Vishishtadvaita Vedanta also places great importance on devotion (bhakti) as the means to attain liberation. Ramanuja taught that by surrendering to Brahman through devotion and service, one can achieve union with Brahman and ultimately attain moksha (liberation).

One of the key concepts in Vishishtadvaita Vedanta is the concept of prapatti, which means surrender. Ramanuja believed that one could attain liberation by surrendering to Brahman and relying on his grace. This surrender involves complete faith and devotion to Brahman, and the understanding that one is dependent on him for liberation.

Another important aspect of Vishishtadvaita Vedanta is the concept of karma. According to Ramanuja, karma is not just the cause and effect of actions, but it also has a moral aspect. He believed that karma is the result of one's actions and thoughts, and it is through karma that one can attain a higher or lower state of existence. Therefore, it is essential to perform good deeds and cultivate positive thoughts to attain a better state in the next life.

In summary, Vishishtadvaita Vedanta is a school of thought that combines the concepts of non-dualism and dualism. It emphasizes the existence of individual souls and their relationship with Brahman, while also stressing the importance of devotion and surrender to attain liberation. Through its teachings, Vishishtadvaita Vedanta offers a path of love, devotion, and service to attain union with Brahman and ultimately achieve moksha.