These are quotes from people I know

"The guy had to ask himself a few questions, that he just answered wrong ."
-Gaurav Rohatagi

"Profanity is a feeble minds attempt at expressing itself forcibly." ;
-My grandfather (Max Lively)

"If you propose a perpetual motion machine to the government, eight time s out of ten it won't get funded."
-Prof. Hugh McManus

"There is a line between using it to your advantage, and drooling on yourself."
-Chris Phelps (talking about creativity being close to insanity)

"It's intuitively obvious."
-MIT saying

"The solution is trivial."
-Me, soon to be MIT saying

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BTW my quote about trivial solutions has replaced MIT's old adage that the answer is intuitively obvious!