here are some very nice lines from the movie, Inception. "you're waiting for a train," .... it signifies one's acceptance that life is a matter of waiting.
"a train that will take you, but you don't know for sure" .... it's a waiting that is coupled with uncertainty. uncertain of what's gonna happen; uncertain of what life brings; uncertain of life itself - and yet it's worth taking.
"But it doesn't matter." ..... the worth is the threshold of faith - a faith that governs the motivation to go on, despite all the uncertainties; despite all the the unknowns. it's the beauty and curse of risk. it's a risk that exemplifies what "being alive" is all about - a plethora of adventure. and for me, that's what life is.