(outlink) ILoveULove.com

If you're interested in spirituality, this looks like it might a decent simple basis for "spiritual love": iloveulove.com - unconditional love, forgiveness, relationships, love & spirituality. Books, articles, advice, forums

I'm planning to read up on this at some point - though I don't believe in spirituality per se, I find that they often have what I see as good metaphors.