"Things that can go wrong will go wrong."
"If things are likely to go bad, no matter how unlikely it is, it will always happen."
"All programs are flawed."
"The more worried things are, the easier it is to happen."
"Ignore small problems, they may become big problems."
"The only thing that can't happen is not to happen."
"Things often go wrong when you are busiest."
"Things are often not as simple as they seem."
"Trying to cover up a problem will lead to a bigger one."
"If you are worried that an outcome will happen, then it is more likely to happen."