Personally I don’t see what the afterlife has to do with your purpose or sense of meaning in this life. For me, I figure my purpose is whatever I find fulfilling in life while hopefully helping others do the same. Anything that comes after that is a bonus.

Part of the identity crises that comes with(out) religion is the ultimate question of purpose: why are we suffering, surely it has a reason? Some of us are content to accept that there is no purpose, and therefore we must define our own; others need a purpose greater than themselves and/or to have one defined for them, and look to religion for that purpose. There is no right answer, and the struggle of identity and purpose are well documented in religion, fiction, history, and philosophy.