Who am I? Why am I here? Who are all of these other beings? What is this material universe? What is the source of all this? How am I related to this source and to these other beings? Such questions have perplexed serious thinkers and seekers for millennia. In Hindu history, there were six classical systems of philosophy which sought to answer these conundrums. Of them, Ved?nta persists as the quintessential Hindu philosophical system. Th at does not, however, mitigate the fact that there are several understandings, or schools, of Ved?nta. Th e oldest surviving school of this ancient knowledge system is that of ?hr? Nimb?rka.