Tantra Sastras

The Tantra literature of India, though in most cases almost lost, is still the only source whence a knowledge of Sadhana in all its aspects-theoretical, practical and ritualistic-may be derived and understood, because it is a Practical (Pratysa) Science. However, the Sastra in its literature is not a plain exposition, which would reveal its intricacies to anyone who lays a hand on it. The Initiation from the Guru is therefore essential. In fact it has been repeatedly emphasized in the Sastra that it can be fully understood only by such an Initiation-Srinatha vaktrat. However, if the subsequent tools which unravel the mysteries of Texts and also assist the process of decoding the Mantras concealed in the Text, are available, a Sadhaka can achieve some practical result.
The various Abhidhanas or Dictionaries come under this category.

The example of Vaisnava Tantra is the Sri Hari Bhakti Vilasa of Srila Sanatana Goswami.

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