“Even in war there should be lines you didn't cross.”

“There’s a fine line between bravery and stupidity, which should never be crossed.”

Lewis Pugh (1969) Environmental campaigner, maritime lawyer and endurance swimmer

“You have now officially crossed the line.”

Neil Bauman (1951)

“Comedy is filled with surprise, so when I cross a line… I like to find out where the line might be and then cross it deliberately, and then make the audience happy about crossing the line with me.”

George Carlin (1937–2008) American stand-up comedian

“You should never apologize for existing, Lev. Not even to all those people out there who wish you didn't.”

Neal Shusterman (1962) American novelist

“there is a fine line between sarcasm and hostility, you seemed to have crossed it. What's up?”

Cassandra Clare (1973) American author

“I don't care what the rivalry is, what the circumstance is, what the standings are, you are not allowed to cross the line in this game and their pitcher crossed it twice. It was pretty clear.”

Carlos Zambrano (1981) Venezuelan baseball pitcher

“You can do something that walks a line, and invariably, whatever that line is, it will be crossed by people who don't know any better and want to ape the success.”

David Fincher (1962) American film director

“You must, therefore, know your limits of self-defence; so as not to cross the line of mercy and forgiveness.”

Mwanandeke Kindembo (1996) Congolese author

“Education is learning what you didn't even know you didn't know.”

Daniel J. Boorstin (1914–2004) American historian