About Tathāgataguhyaka Sūtra

The Tathāgataguhyaka Sūtra or Tathāgatācintyaguhyanirdeśasūtra is an important Mahayana Buddhist sutra, which is also part of the Mahāratnakūṭa compilation.
Ruins of the Nalanda Mahavihara (Great Monastery) in Bihar

Mahayana – The Bodhisattva path

is a term for a broad group of Buddhist traditions, texts, philosophies, and practices. Mahāyāna Buddhism developed in India and is considered one of the two main existing branches of Buddhism. Mahāyāna accepts the main scriptures and teachings of early Buddhism, but also adds various new doctrines and texts such as the Mahāyāna Sūtras and its emphasis on the bodhisattva path and Prajñāpāramitā. Vajrayāna or Mantra traditions are a subset of Mahāyāna, which .