Indian religions Brahmanas and the older Upanishads (both presented as discussions on the rituals, mantras and concepts found in the four Vedas), which today are some of the most important canonical texts of Hinduism, and are the codification of much of what developed into the core beliefs of Hinduism. Some modern Hindu scholars use the "Vedic religion" synonymously with "Hinduism." According to Sundararajan, Hinduism is also known as the Vedic religion. Other authors state that the Vedas contain "the fundamental truths about Hindu Dharma" which is called "the modern version of the ancient Vedic Dharma" The Arya Samajis recognize the Vedic religion
Vedas Brahmanas (commentaries on rituals, ceremonies and sacrifices), and the Upanishads (texts discussing meditation, philosophy and spiritual knowledge). Some scholars add a fifth category – the Upasanas (worship). The various Indian philosophies and denominations have taken differing positions on the Vedas. Schools of Indian philosophy which cite the Vedas as their scriptural authority are classified as "orthodox" (āstika). Other śramaṇa traditions, such as Lokayata, Carvaka, Ajivika, Buddhism and Jainism, which did not regard the Vedas as authorities, are referred to as "heterodox" or "non-orthodox" (nāstika) schools. Despite their differences, just like the texts of the śramaṇa traditions, the layers of texts