An experience of Fear
An experience of Feelings
An experience of Ego
An experience of Time
An experience of Expectations
Both. On and off, good and bad, and both of these things and neither.
It appears that without accepting both we are not accepting all things as they are. Samsara and nirvana are one and the same. Accepting all and nothing we find part of the (non-)way to maturity. The nirvana people, they get to escape. The ones who wear the shit-stained robes of saints, well, for them, they really gotta work at it.
Maybe ;)