Janakeshwar Shiva is worshipped in Varanasi in India.
Information about this form is found in the Kashi Khanda (chapter) of Skanda
Purana. Jnanakeshwar form of Shiva is worshipped for getting the ultimate
knowledge of self realization.
The Jnana which can help one realize the ultimate truth can
be attained with the blessing of Shiva.
Jnanakeshwar Shivling is worshipped near the famous
Malteeshwar Temple. There is also a sacred well located nearby. It is known as
Kalodak Koop.
Jnankeshwar form of Shiva makes us realize the limitations of the physical body. He teaches us to go beyond the physical. Nothing in the vast cosmos should restrain you from realizing the fact that you are the supreme truth. All boundaries are imaginary and manmade. There are no boundaries to cross. You just need to sit and meditate on Shiva to see what you are searching for lighting up within you. Once you have understood and know this, then you will simply sit back and be part of nature.
Jnankeshwar makes you realize that you are already boundless. All kinds of bondage etc are result of ignorance.