there is no single way to describe what life is to a person or what the meaning or secret to life is. I once heard from an oh-so-wise man that the secret to life is "motion" "to get up and keep going" and yes it does seem true. I don't think i could ever be able to figure it out for myself and maybe we aren't meant to figure it out.
Light at the end of the tunnel. Hmm I think that life is just one very long big tunnel that you have to walk alone. With two doors on either side of you, and you have to choose which one your going in. And the lights above that keep you on track, represent everyone that you care about. Sometimes a light will burn out-maybe when you need it most. But with every light that burns out, the one at the end becomes brighter and brighter. So you might be lost in the darkness for a while and stumble and fall. You cant run through the tunnel either i mean imagine how much you'd miss!