Know that to be indestructible, on which this whole world is strung; nor can anyone bring about?

Question

Know that to be indestructible, on which this whole world is strung; nor can anyone bring about the destruction of this immutable self.

If you think over it, you will realise that what is inessential is illusory, and what is essential is eternal by nature. That from which these three worlds have sprung is not marked by name, colour or form. It is all-pervasive and transcends birth and death; even if one wishes to destroy it, it cannot be destroyed (131-135).

Source : Jnaneswari viz Bhagavad Gita
http://www.saibaba.us/texts/jnaneshwari/chpt02.html

Any Integrals or Derivatives for the concepts with any different variables ?

Answer 1

"Death is inevitable for the living, and life is inevitable for the dead."

Answer 2

Nitya shudha budha mukta bhava meeshamatmanah, Bhaavayamsha indriyaani samiyamya nishchalaha. Asti vastu chiddhanam jagat prasooti karanam.....