Here is an excerpt about love in harmony:
Symbiosis is the big special love where two beings come together in perfect harmony. They become one, living together, changing together, staying together for all time. This is different from any other kind of relationship. Love like this does not happen often. In a world full of predation, disease, parasitism, mutualism, commensalism, and stoic, uncaring loneliness, misunderstandings are more common than total understanding. But when it does happen it changes the whole world.