"Nirvichara Samapthi" refers to a state of profound mental absorption or concentration achieved through the practice of Yoga, specifically as described in the Yoga Sutras attributed to the ancient sage Patanjali. In the Yoga Sutras (1.42-44), Patanjali delineates four types of samapatti, or states of absorption: savitarka and nirvitarka, savichara and nirvichara. Savitarka: This is the state of concentration where the mind is focused on an object along with its associated reasoning or conceptualization. Nirvitarka: In this state, concentration deepens to the point where conceptualization or reasoning is absent, but awareness of the object remains. Savichara: This is a state where the mind is absorbed in an object along with subtle thought processes or reflection. Nirvichara: Nirvichara samapti denotes a deeper level of concentration where the mind is fully absorbed in the object without any subtle thought processes. It is a state of pure awareness devoid of any mental a...