Spanda Karika is an ancient Tantric text written by Kallada. Kallada was the disciple of Vasugupta, to whom the
Shiva Sutras were believed to have been revealed. Kallada wrote the Spanda Karika, based on the Shiva Sutras.
‘Spanda’ is defined as the conscious power that infuses life into the physical body. Spanda Karika has 51 verses. It says that the world is inherent in Spanda, just as a banyan tree exists as potency, in the seed.