The Shaivist conception of these tattva has Shiva constantly evolving and devolving thru the tattva. Shiva is the eternal subject, the first illuminator, the first enjoyer. His movement thru the tattva an expression of his joy. This movement has many names (spanda, wave, force and it shows his movement from Shiva tattva to earth and back to Shiva tattva. The process of creation and destruction going on continually. But even this is not as it seems. Most of us would assume destruction is happening as Shiva makes his way back to himself, but actually earth will be the first to die. Being fully manifest puts us most solidly in the world of death, sorrow and suffering. This is where all this fire and brimstone of kali and Shiva’s burning ghats comes from.