“The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”
“Five percent of the people think; ten percent of the people think they think; and the other eighty-five percent would rather die than think.”
“We cannot solve our problems with the same thinking we used when we created them.”
“It is the mark of an educated mind to be able to entertain a thought without accepting it.”
“Thinking is the hardest work there is, which is probably the reason so few engage in it.”
“The quality of your thinking determines the quality of your life.”
“I insist on a lot of time being spent, almost every day, to just sit and think. That is very uncommon in American business.”
“Clear thinking requires courage rather than intelligence.”
“The trouble with most people is that they think with their hopes or fears or wishes rather than with their minds.”
“Never mistake the map for the territory.”
“All models are wrong, but some are useful.”
“It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so.”