“Anything that happens, happens.Anything that, in happening, causes something else to happen, causes something else to happen.Anything that, in happening, causes itself to happen again, happens again.It doesn’t necessarily do it in chronological order, though.”

“She tried to worry that something terrible had happened to him, but didn't believe it for a moment. Nothing terrible ever happened to him, though she was beginning to think that it was time it damn well did. If nothing terrible happened to him soon maybe she'd do it herself. Now there was an idea.”

“There is no point in using the word 'impossible' to describe something that has clearly happened.”

“In an infinite Universe anything can happen.”

“For a moment, nothing happened. Then, after a second or so, nothing continued to happen.”

“Arthur Dent: What happens if I press this button?Ford Prefect: I wouldn't-Arthur Dent: Oh.Ford Prefect: What happened?Arthur Dent: A sign lit up, saying 'Please do not press this button again.”

“Everybody has their moment of great opportunity in life. If you happen to miss the one you care about, then everything else becomes eerily easy.”