Q: Nirvana is a fundamental spiritual experience, is it not?
Nirvana, as I know it, is a necessary experience in order to get rid of the nature-personality which is subject to ignorance. You cease to be the small individual ego in a vast world. You throw away that and become the One in Nirvana. Nirvana is a passage, for passing into a condition in which your true individuality can be attained. That true individuality is not a small, narrow and limited self contained in the world, but is vast and infinite and can contain the world within it self; you can remain in the world and yet be above it, so to say. To get rid of the separative personality in nature Nirvana is a powerful experience.
– Sri Aurobindo