Yasser Arafat at the End of His Lies - Hillel Halkin
There is, in the world of diplomacy, only one type of leader with whom one must never negotiate under any circumstance - the leader who is a liar. It isn't a question of moral principle. It's a purely pragmatic question of utility. A terrorist who can be trusted to keep his word is a man you can do business with. It is impossible, though, to do business with a liar. There is no point in making agreements with someone who does not believe in the importance of keeping them.
This is a truth so simple and so obvious that it seems all but impossible to understand now how it could have eluded those who welcomed the disaster of Oslo with open arms 11 years ago. They thought that lying, like terrorism, was something that, if done up to a point for a purpose, could be after that point given up. They didn't realize that a man who has lied all his life will go on lying right up to his death. (NY Sun)