"Most people spend nearly all their energy trying not to change. This is what the philosopher William James meant when he wrote the mind’s main function was to be a fortress for protecting your ego from reality. When the mind has to accommodate a new fact, James argued, it doesn’t settle on the change to its model of reality that is most likely to reflect reality. It protects the fortress, calculating the smallest possible modification to its bulwarks that can account for the new fact." - Glenn Kelman http://www.standfirminfaith.com/?/sf/page/30480