In the film "Contact" ---

Little Ellie ask :"Do you think there're people on other planets?"

Her dad Ted said :"Well let's see... the Universe is a pretty big place... And the one thing I know about nature is it hates to waste anything. So I guess I'd say if it is just us, an awful lot of space is going to waste."

Ellie grown up and after the space adventure :"I was given something wonderful. Something that changed me. A vision of the universe that made it overwhelmingly clear just how tiny and insignificant -- and at the same time how rare and precious we all are. A vision... that tells us we belong to something greater than ourselves... that we're not -- that none of us -- is alone."

When you understand what these means I think you know what is mean by true love.

To love our nature, love our earth and our universe.