"Nastika" refers to a category of philosophical schools in Indian thought that do not accept the authority of the Vedas, the ancient sacred texts of Hinduism. This term is often associated with various non-theistic traditions, including Buddhism and Jainism, which emphasize personal experience and ethical living over scriptural adherence. In contrast to Astika schools, which affirm the Vedic texts, Nastika philosophies explore alternative paths to understanding reality and achieving liberation. These traditions often focus on concepts such as karma, samsara, and the nature of suffering, providing diverse perspectives on existence and the human condition.