Only the impossible?

To talk about Love, my current philosophy is:

"Only the impossible is worth the effort." - The Powerbook, Jeanette Winterson.

So she asked: "What is impossible?" or perhaps it was "Why is it impossible?"

Today I read: "the discourse which makes people believe is the one that takes away what it urges them to believe in, or never deliver what it promises..." - Walking in the City, Michel de Certeau

That could be quite depressing....

Bugger. Where are my promised words? I thought I said not again...