Nirvana is a name for the Absolute which is nothing but unmovable peace and Samsara is a name for the manifestation. Samsara is a movement in Nirvana. In reality both are one and the same, that is to say that there is not even Nirvana and Samsara. When one releases the non separateness between Samsara and Nirvana Samsara is experienced in peace. I normally don't use such terminologies but it seems you are familiarise with it and it may be easy for you to understand if I use your own vocabulary. Another way to put it is that That which is conscious is Nirvana and what That is conscious of is Samsara. And again, if both are one, who is experiencing what?! At the end all this gets reduce to a meaningless concept and it is discarded and life is experience first hand, some times I call it raw experiencing.
Cesar Teruel.