“The real trouble with this world of ours is not that it is an unreasonable world, nor even that it is a reasonable one.  The commonest kind of trouble is that it is nearly reasonable, but not quite.  Life is not an illogicality; yet it is a trap for logicians.  It looks just a little more mathematical and regular than it is; its exactitude is obvious, but its inexactitude is hidden; its wildness lies in wait.”
-G.K. Chesterton

“The whole world of economics is enormously more complex than the world of physics. And therefore the teaching of business schools, including Yale’s, is unrealistic. Even though economics is a very old subject, it has not truly come to grips with the main difficulty, which is the inordinate practical importance of a few extreme events.”
– Mandelbrot

“The sign above the players’ entrance to the field at Notre Dame reads ‘Play Like a Champion Today.’ I sometimes joke that the sign at Nebraska reads ‘Remember Your Helmet.’  Charlie and I are ‘Remember Your Helmet’ kind of guys. We like to keep it simple.”
-Warren Buffett