Is nirvana not extinction?

> Nirvana is not extinction because mind (which, from the first, was the > only authentic component of the vanished beings) persists; it is not > heaven because no sentient being remains to enter it Can you explain it so that I'm sure it is right? In other words, expand on it, or append it, etc. You may use concepts like "one mind", "mindful", etc,, whatever you like.