# Vichar Sagar *19th century · Pandit Nischal Das* The *Vichar Sagar* ("Ocean of Contemplation") is Pandit Nischal Das's nineteenth-century vernacular treatise on Advaita Vedānta — among the most widely read works of nondual philosophy in North India, and influential within Sikh Nirmala and Udasi circles. Manglacharan draws on it for the tradition's engagement with Vedānta. ## Related - [[Vedanta & the Nondual]] - [[Purpose of Vichar Sagar]]