'O Sariputra, The Sandhabhasya of the Tathagatas is very difficult .'
The '' Sandhyabhasa '' ('language of light and darkness') is a twilight language that has traditionally veiled the transmission of esoteric teachings. The twilight language served once to code the knowledge as well as to increase the intuition of the pupils.
The initiates were anxious to protect the teachings from immature students and from the practitioners of the black path. An allegorical secret symbolism was therefore common not only in Tantric Shivaism but also in the Puranas and in the Vedas.
The word gaṇḍa in the Gandavyuha - Sutra also means 'a language with double meaning'.
The Hevajra Tantra teaches that there is a secret language and the great convention of the Yoginis, which can not be unraveled by the Shravakas and others.
Thai bhikkhu Buddhadasa had explored the importance of the symbolic language in the Pali Canon in a number of lectures and publications.
Matsyendranath and Daripada from the Natha Pantha also wrote their poems in the ''Sandhya bhasa'' symbol language.
In spiritual alchemy, a graphic symbolism was a means of spreading also because of church and authority.
Some teachers of Sufism used the Balaibalan language (translated as: language made alive) after execution of some masters.
There have been many reasons for such a secret language. If it would have been written openly, selfish man would have tampered with the script to such an extent that nobody could decipher its meaning after a few centuries. However, since it was written in pictures, selfish man did not understand its content and thus it was preserved until today and for everyone through the millennial who was knowledgeable about the true Cabala and other esoteric systems.
== Literature ==