The term Sachidanda is used for Only Shiva.
And Consciousness is elevated to Realization by Vaasi Yoga.
I am providing some basic details of Vassi Yoga.
Do Not Attempt to Practice without Initiation from a Guru.
Practicing without initiation by a Guru may prove to be serious and at times Fatal.
This expands as the Universe.
This power is in many Forms
This Power Impels our Mind to function.
Let us Pray to Light the most potent of this Power .
Seven births indicate the number of births one has to undergo.
Some Rishis have been advisers to Kings, like Vasishta, no Siddha is associated as an adviser to King.
All Siddhas have been Rishis while not all Rishis were Siddhas.
The Yoga system by the Siddhas is slightly different from the one By Patanjali in Sanskrit, though Patanjali is from South and a Siddha.
Siddhas have developed alternate system of medicine based on hers found in the South, the Rishis , based on the herbs found in the North.
There are two systems in Raja Yoga.
One is Yoga by Patanjali and another is by Thirumoolar.
Though essentailly they are the same, minor differnces in application may be noticed.
Then we have Siddhas, both from the South and North of Vindhyas in India.
The Missionaries in their effort to demolish Sanatana Dharam assumed Indian/Hindu Identities beginning with Robert De Nobili in Tamil Nadu.
They infiltrated into Hinduism under the garb of embracing it,learnt the local languages and Sanskrit , misinterpreted,misinformed, created forgeries of Hindu Literature ,apart from producing Christian literature modled afer Hindu Texts.
Thus they call the Bible as Vedaagamam. have even Jesus Sahasra nama!
These interpolations have resulted in the pollution of Indian Texts.
They have not spared even the Vedas, with Max Mueller leading the pack