"Keep your eyes wide open before marriage, half shut afterwards."It is said to be an antecedent to the Stanley Kubrick 1999 film, "Eyes Wide Shut," starring Tom Cruise and Nicole Kidman, which explores the hardships of keeping an ongoing relationship alive. [Source: Wikipedia] On a side note, it's funny that it stars now-divorced couple Tom Cruise and Nicole Kidman. Also, I've always associated Kubrick only with the sci-fi genre, and specifically, the "2001: A Space Odyssey" movie.
Anyway, this Benjamin Franklin quote probably best captures my own beliefs about marriage, and I would think, that of my real close friends', too.