Nietzsche was as the voice of God who said: HA! Hello, I am here, underneath your feet, here I am, I'm called "necessity".
Only necessity is eternal, omnipresent and omnilogoic by definition. "Existence" is not. Who's existence, Gods? Your great great grandchild "Sonnyboy III"?
Its property is recurrence of the cycle of differentiation and resublimation.
Why is this cycle implicit in the very idea of something?
Flux, the coming into being of the flower, the 'season' and its spark, the moment which is called beauty, the "thing". By the idealization of the most sublime moment in a process, the world is become known to the word.